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Questions and Answers
What is the formula for the centripetal acceleration in uniform circular motion?
What is the formula for the centripetal acceleration in uniform circular motion?
- $a = v \times r$
- $a = \frac{{v^2}}{{r}}$ (correct)
- $a = \frac{{r}}{{v^2}}$
- $a = r - v$
What is the centripetal force formula?
What is the centripetal force formula?
- $F_c = \frac{{m}}{{r}}$
- $F_c = m \times r$
- $F_c = m \times a$
- $F_c = \frac{{m \times v^2}}{{r}}$ (correct)
What is Newton's Third Law of Motion?
What is Newton's Third Law of Motion?
- The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
- An object that exerts a force on another object also experiences an equal force from that other object but in the opposite direction. (correct)
- An object in motion stays in motion unless acted upon by an external force.
- The force acting on an object is equal to the mass of the object multiplied by its acceleration.
In the context of Newton's third law, what forces are equal but opposite?
In the context of Newton's third law, what forces are equal but opposite?
According to Newton’s third law, what is the magnitude of the pull that the moon exerts on Earth?
According to Newton’s third law, what is the magnitude of the pull that the moon exerts on Earth?
What did Sir Isaac Newton use as leverage to figure out his law of universal gravitation?
What did Sir Isaac Newton use as leverage to figure out his law of universal gravitation?
What forms the small blue base of the velocity triangle?
What forms the small blue base of the velocity triangle?
In the proportionality ratios for the isosceles triangles, what does $r$ represent?
In the proportionality ratios for the isosceles triangles, what does $r$ represent?
What happens to your left hip when the bus turns right?
What happens to your left hip when the bus turns right?
What happens to your right hip when the bus turns left?
What happens to your right hip when the bus turns left?
What does locking onto a grab bar do?
What does locking onto a grab bar do?
What happens if a person fails to brace when the bus slows down?
What happens if a person fails to brace when the bus slows down?
What can be a good way to meet people, according to the text?
What can be a good way to meet people, according to the text?
What is a more serious example of the law of inertia mentioned in the text?
What is a more serious example of the law of inertia mentioned in the text?
What is the reason for automobiles to have head restraints and airbags?
What is the reason for automobiles to have head restraints and airbags?
What does Newton's second law of motion state?
What does Newton's second law of motion state?
According to Newton's second law, how does acceleration change in relation to mass and net force?
According to Newton's second law, how does acceleration change in relation to mass and net force?
In one dimension, how are forces added up?
In one dimension, how are forces added up?
What does a negative number represent when working in one dimension?
What does a negative number represent when working in one dimension?
What does force Fnet represent when two opposing forces are different sizes?
What does force Fnet represent when two opposing forces are different sizes?
What does G control in the context of general relativity?
What does G control in the context of general relativity?
If our star, the Sun, could be squeezed to a sphere of about 3 kilometer radius, what would it become?
If our star, the Sun, could be squeezed to a sphere of about 3 kilometer radius, what would it become?
What did Halley predict would return in the year 1758?
What did Halley predict would return in the year 1758?
What was Halley's interest in comets according to Newton's theory of universal gravitation?
What was Halley's interest in comets according to Newton's theory of universal gravitation?
What is the event horizon of a black hole?
What is the event horizon of a black hole?
What did Halley and Newton successfully verify with their predictions and observations?
What did Halley and Newton successfully verify with their predictions and observations?
What is the upward force that balances the weight force experienced by the objects?
What is the upward force that balances the weight force experienced by the objects?
At what point does the upward drag force balance the downward weight force, resulting in the skydiver reaching a constant speed?
At what point does the upward drag force balance the downward weight force, resulting in the skydiver reaching a constant speed?
What is the direction of the acceleration on a circular path at constant speed?
What is the direction of the acceleration on a circular path at constant speed?
What does the term 'centripetal' refer to in the context of circular motion?
What does the term 'centripetal' refer to in the context of circular motion?
What is the name of the large circular test track in Nardo where European automakers test their vehicles at high speed?
What is the name of the large circular test track in Nardo where European automakers test their vehicles at high speed?
What is responsible for increasing resistance as a skydiver's speed increases?
What is responsible for increasing resistance as a skydiver's speed increases?
In what direction is the acceleration on a circular path at constant speed?
In what direction is the acceleration on a circular path at constant speed?
What do we call the arrow points away from the center in dynamic terms?
What do we call the arrow points away from the center in dynamic terms?
Which force opposes his fall as his speed increases?
Which force opposes his fall as his speed increases?
The Nardo Ring has lanes banked sufficiently for vehicles to travel at a constant speed of __________ m/s.
The Nardo Ring has lanes banked sufficiently for vehicles to travel at a constant speed of __________ m/s.
The change in velocity's direction as a vehicle goes around the track is due to __________.
The change in velocity's direction as a vehicle goes around the track is due to __________.
What did the ancient Greeks believe was circling around Earth, carrying the stars on their paths?
What did the ancient Greeks believe was circling around Earth, carrying the stars on their paths?
What held the Jovian moons in predictable orbits around Jupiter?
What held the Jovian moons in predictable orbits around Jupiter?
What did Newton describe in his book Principia as having a total period of repetitive motion of 2 seconds?
What did Newton describe in his book Principia as having a total period of repetitive motion of 2 seconds?
What did Newton use to make a very nice calculation of the moon’s centripetal acceleration?
What did Newton use to make a very nice calculation of the moon’s centripetal acceleration?
What did Sir Isaac Newton know about the force of gravity on Earth?
What did Sir Isaac Newton know about the force of gravity on Earth?
What did the length of the pendulum set up in Paris equal to, according to Newton?
What did the length of the pendulum set up in Paris equal to, according to Newton?
What did Newton assume when discussing gravity?
What did Newton assume when discussing gravity?
What did Sir Isaac Newton use to measure Earth's circumference?
What did Sir Isaac Newton use to measure Earth's circumference?
Why did Newton decide to work with a round figure when discussing gravity?
Why did Newton decide to work with a round figure when discussing gravity?
How precise was French mathematician Jean Picard's measurement of Earth’s circumference?
How precise was French mathematician Jean Picard's measurement of Earth’s circumference?
What did Newton use to make a very nice calculation of the moon’s centripetal acceleration?
What did Newton use to make a very nice calculation of the moon’s centripetal acceleration?
What was necessary for Galileo, Newton, and Halley to understand about stars and planets?
What was necessary for Galileo, Newton, and Halley to understand about stars and planets?
What did Newton estimate in terms of the moon's fall?
What did Newton estimate in terms of the moon's fall?
In which unit did Newton estimate the distance the moon would fall?
In which unit did Newton estimate the distance the moon would fall?
What pattern from astronomical observations did Newton build his conjecture on?
What pattern from astronomical observations did Newton build his conjecture on?
In what book did Sir Isaac Newton write his first statement of the law of gravitation?
In what book did Sir Isaac Newton write his first statement of the law of gravitation?
What is the formula for the gravitational force according to the text?
What is the formula for the gravitational force according to the text?
How does one convert square meters in the denominator into Newtons of force?
How does one convert square meters in the denominator into Newtons of force?
What physically measurable quantity might go into the numerator of the formula for gravitational force?
What physically measurable quantity might go into the numerator of the formula for gravitational force?
What is the metric unit of force mentioned in the text?
What is the metric unit of force mentioned in the text?
What is the multiplicative constant known as in the text?
What is the multiplicative constant known as in the text?
Who set out to measure the gravitational force of a mountain named Schiehallion?
Who set out to measure the gravitational force of a mountain named Schiehallion?
How did Henry Cavendish make a more precise measurement of gravitational force?
How did Henry Cavendish make a more precise measurement of gravitational force?
What could be calculated using Henry Cavendish's measurements?
What could be calculated using Henry Cavendish's measurements?
What is the weight force of the 5.0 kg box of hammers?
What is the weight force of the 5.0 kg box of hammers?
When two forces act on an object in two different directions, what determines the direction of the resulting acceleration?
When two forces act on an object in two different directions, what determines the direction of the resulting acceleration?
How can the size of the net force be computed when two forces act together but in different directions?
How can the size of the net force be computed when two forces act together but in different directions?
In the dragster example, what balances the weight force acting upon it?
In the dragster example, what balances the weight force acting upon it?
Why does the dragster not trench itself into the track even though it has a downward weight force and a forward force?
Why does the dragster not trench itself into the track even though it has a downward weight force and a forward force?
What would happen if a dragster were to race on a pool of liquid water?
What would happen if a dragster were to race on a pool of liquid water?
What is responsible for providing an upward rigidity force that balances the weight force on a drag strip?
What is responsible for providing an upward rigidity force that balances the weight force on a drag strip?
Why use liquid water as an example of what a race track is not?
Why use liquid water as an example of what a race track is not?
What does the 'normal' force refer to in this context?
What does the 'normal' force refer to in this context?
What did Sir Isaac Newton describe as a resistance to changes in the state of motion unless some unbalanced force acts on the object?
What did Sir Isaac Newton describe as a resistance to changes in the state of motion unless some unbalanced force acts on the object?
What is an interesting way to understand Newton’s First Law of Motion, according to the text?
What is an interesting way to understand Newton’s First Law of Motion, according to the text?
What happens if a person fails to brace when the bus slows down, according to the text?
What happens if a person fails to brace when the bus slows down, according to the text?
According to Sir Isaac Newton's First Law of Motion, what does every object persevere in unless compelled to change by forces acting upon it?
According to Sir Isaac Newton's First Law of Motion, what does every object persevere in unless compelled to change by forces acting upon it?
What is the main focus of Newton’s first law of motion?
What is the main focus of Newton’s first law of motion?
How does Newton describe inertia in his first law of motion?
How does Newton describe inertia in his first law of motion?
What does the example of the UCF shuttle bus illustrate about Newton's first law of motion?
What does the example of the UCF shuttle bus illustrate about Newton's first law of motion?
Why do passengers need to stabilize themselves on the UCF shuttle bus?
Why do passengers need to stabilize themselves on the UCF shuttle bus?
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