Podcast
Questions and Answers
A car accelerates from rest to 20 m/s in 5 seconds. If the car's mass is 1500 kg, what is the net force acting on it, assuming constant acceleration?
A car accelerates from rest to 20 m/s in 5 seconds. If the car's mass is 1500 kg, what is the net force acting on it, assuming constant acceleration?
- 3,000 N
- 7,500 N
- 6,000 N (correct)
- 46,000 N
A box is pushed across a floor with a force of 100 N at an angle of 30 degrees to the horizontal. If the box moves 10 meters, how much work is done on the box?
A box is pushed across a floor with a force of 100 N at an angle of 30 degrees to the horizontal. If the box moves 10 meters, how much work is done on the box?
- 1333 J
- 866 J (correct)
- 1000 J
- 500 J
A 2 kg ball is dropped from a height of 10 meters. What is its kinetic energy just before it hits the ground, assuming no air resistance?
A 2 kg ball is dropped from a height of 10 meters. What is its kinetic energy just before it hits the ground, assuming no air resistance?
- 294 J
- 392 J
- 98 J
- 196 J (correct)
Two objects collide. Object A (mass 5 kg, velocity 10 m/s) collides with Object B (mass 3 kg, velocity -5 m/s). If the collision is perfectly inelastic, what is the final velocity of the combined mass?
Two objects collide. Object A (mass 5 kg, velocity 10 m/s) collides with Object B (mass 3 kg, velocity -5 m/s). If the collision is perfectly inelastic, what is the final velocity of the combined mass?
A merry-go-round with a moment of inertia of 500 kgm² has a constant torque of 200 Nm applied to it. What is its angular acceleration?
A merry-go-round with a moment of inertia of 500 kgm² has a constant torque of 200 Nm applied to it. What is its angular acceleration?
What happens to the gravitational force between two objects if the distance between them is doubled?
What happens to the gravitational force between two objects if the distance between them is doubled?
A sound wave has a frequency of 440 Hz and a wavelength of 0.75 meters. What is the speed of the sound wave?
A sound wave has a frequency of 440 Hz and a wavelength of 0.75 meters. What is the speed of the sound wave?
A light ray travels from air into glass (n=1.5). If the angle of incidence is 30 degrees, what is the angle of refraction?
A light ray travels from air into glass (n=1.5). If the angle of incidence is 30 degrees, what is the angle of refraction?
A 50-ohm resistor has a current of 2 amps flowing through it. What is the voltage across the resistor?
A 50-ohm resistor has a current of 2 amps flowing through it. What is the voltage across the resistor?
Which of the following best describes the Heisenberg uncertainty principle?
Which of the following best describes the Heisenberg uncertainty principle?
Flashcards
What is Physics?
What is Physics?
Study of matter, energy, and their interactions, aiming to understand the universe's fundamental laws.
What is Mechanics?
What is Mechanics?
Deals with object's motion and forces, broken down into kinematics (motion description) and dynamics (motion causes).
Newton's First Law
Newton's First Law
Object stays at rest/motion unless acted upon.
Newton's Second Law
Newton's Second Law
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Newton's Third Law
Newton's Third Law
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What is Energy?
What is Energy?
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Kinetic Energy (KE)
Kinetic Energy (KE)
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What is Momentum?
What is Momentum?
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What are Waves?
What are Waves?
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What is Refraction?
What is Refraction?
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