Podcast
Questions and Answers
A hockey puck is set in motion across a frozen
pond. If ice friction and air resistance are neglected,
the force required to keep the puck sliding at
constant velocity is
A hockey puck is set in motion across a frozen pond. If ice friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is
- equal to its weight
- equal to its weight divided by its mass
- equal to its mass times its weight
- none of these (correct)
The amount of force needed to sustain motion of a
rock in outer space is
The amount of force needed to sustain motion of a rock in outer space is
- a force equal to its weight
- a force less than its weight if friction is absent
- none of these (correct)
A constant net force on a railroad car produces
constant
A constant net force on a railroad car produces constant
- velocity
- acceleration (correct)
- both of these
- neither of these
If an object’s mass is decreasing while a constant
force is applied to the object, the acceleration
If an object’s mass is decreasing while a constant force is applied to the object, the acceleration
When you walk, you push on the floor to the left
and the floor
When you walk, you push on the floor to the left and the floor
The force of friction on a sliding object is 10 N. The
applied force needed to maintain a constant velocity
is
The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is
A 10-N falling object encounters 4 N of air
resistance. The net force on the object is
A 10-N falling object encounters 4 N of air resistance. The net force on the object is
When a falling object has reached its terminal
velocity, its acceleration is
When a falling object has reached its terminal velocity, its acceleration is
A ball is thrown vertically into the air. Because of
air resistance on the way up and on the way down,
its speed when it returns to its starting level
compared with its initial speed is
A ball is thrown vertically into the air. Because of air resistance on the way up and on the way down, its speed when it returns to its starting level compared with its initial speed is
Isaac Newton discovered
Isaac Newton discovered
According to Isaac Newton, the greater the masses
of interacting objects, the
According to Isaac Newton, the greater the masses of interacting objects, the
The difference between Newton's law of universal
gravitation as a proportion and as an equation
involves
The difference between Newton's law of universal gravitation as a proportion and as an equation involves
The gravitational constant G was first measured
The gravitational constant G was first measured
The force of Earth’s gravity on a capsule in space
will lessen as it moves farther away. If the capsule
moves to twice its distance, the force toward Earth
becomes
The force of Earth’s gravity on a capsule in space will lessen as it moves farther away. If the capsule moves to twice its distance, the force toward Earth becomes
The force of Earth’s gravity on a capsule in space
increases as it comes closer. When the capsule
moves to half its distance, the force toward Earth is
then
The force of Earth’s gravity on a capsule in space increases as it comes closer. When the capsule moves to half its distance, the force toward Earth is then
Your weight is the force
Your weight is the force
When you weigh yourself on a bathroom scale on a
slight incline instead of a level surface, your weight
reading on the scale will be
When you weigh yourself on a bathroom scale on a slight incline instead of a level surface, your weight reading on the scale will be
The concept of force is fundamental to
The concept of force is fundamental to
Flashcards
Motion on Frictionless Surface
Motion on Frictionless Surface
No force is needed to maintain constant velocity on a frictionless surface.
Constant Net Force
Constant Net Force
A constant net force results in constant acceleration.
Decreasing Mass, Constant Force
Decreasing Mass, Constant Force
As mass decreases with constant force, acceleration increases.
Walking Force Pair
Walking Force Pair
Signup and view all the flashcards
Terminal Velocity Acceleration
Terminal Velocity Acceleration
Signup and view all the flashcards
Vertical Throw Air Resistance
Vertical Throw Air Resistance
Signup and view all the flashcards
Law of Universal Gravitation
Law of Universal Gravitation
Signup and view all the flashcards
Gravity and Mass
Gravity and Mass
Signup and view all the flashcards
Gravitational Constant (G)
Gravitational Constant (G)
Signup and view all the flashcards
Gravity and Double Distance
Gravity and Double Distance
Signup and view all the flashcards
Gravity and Half Distance
Gravity and Half Distance
Signup and view all the flashcards
Weight Definition
Weight Definition
Signup and view all the flashcards
Weight on Incline
Weight on Incline
Signup and view all the flashcards
Fundamental Nature of Force:
Fundamental Nature of Force:
Signup and view all the flashcards
Study Notes
Forces and Motion
- No force is required to keep a hockey puck sliding at constant velocity on a frictionless surface.
- No force is required to sustain the motion of an object in outer space.
Constant Force and Acceleration
- A constant net force on an object results in constant acceleration.
- If an object's mass is decreasing while a constant force is applied, its acceleration increases.
Forces and Interactions
- When you walk, you push on the floor to the left, and the floor exerts an equal and opposite force on you.
- The force of friction on a sliding object is 10 N, and an applied force of 10 N is needed to maintain a constant velocity.
Gravity and Falling Objects
- A falling object encounters air resistance, which opposes its motion. If the object encounters 4 N of air resistance, the net force on the object is 6 N (10 N - 4 N).
- When a falling object reaches its terminal velocity, its acceleration is 0 m/s².
- Due to air resistance, a ball thrown vertically into the air returns to its starting level with a lower speed than its initial speed.
Newton's Law of Universal Gravitation
- Isaac Newton discovered the law of universal gravitation.
- According to Newton, the greater the masses of interacting objects, the greater the gravitational force between them.
- The difference between Newton's law of universal gravitation as a proportion and as an equation involves the gravitational constant G.
Gravity and Distance
- The force of Earth's gravity on an object in space decreases as the object moves farther away. If the object moves to twice its distance from Earth, the force toward Earth becomes 1/4 of its original value.
- The force of Earth's gravity on an object in space increases as it moves closer. If the object moves to half its distance from Earth, the force toward Earth doubles.
Weight and Gravity
- Your weight is the force of Earth's gravity on you.
- When you weigh yourself on a bathroom scale on an incline, your weight reading on the scale will be lower than on a level surface.
Fundamental Concept
- The concept of force is fundamental to understanding the natural world.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
