AP Physics with Hansenator - Kinematics and Forces Quiz

True/False (3 Points Each)

____ 1. Displacement is how far an object travels from its initial position.
____ 2. If a car travels around a track once, of radius 1, and stops, then its displacement is 2π.
____ 3. Acceleration is a change in distance over time.
____ 4. The slope of a velocity versus time graph is the acceleration.
____ 5. The area under a velocity versus time graph is the acceleration.
____ 6. Time (t) is usually the x-axis, or the independent variable.
____ 7. After two seconds of an object falling on Earth its speed is 19.6 m/s.
____ 8. When an object slows down the acceleration is negative.
____ 9. Acceleration due to gravity is -9.6 m/s^2.
____ 10. When an object speeds up, its acceleration is in the direction of motion.
____ 11. is a proper kinematic equation.
____ 12. is an equation for displacement.
____ 13. If I kick a ball at an angle of 45°, then the vertical speed is constant.
____ 14. If I kick a ball at an angle of 45°, then the horizontal speed is constant.
____ 15. An unbalanced force on an object causes an acceleration.
____ 16. The equation for force is F=ma. This is also known as Newton’s Second Law.
____ 17. If an object is in equilibrium (zero acceleration), then there are no forces acting on it.
____ 18. Force is measured in Newtons.
____ 19. The unit for Newtons is kg*m/s^2.
____ 20. Forces acting in the same direction add together.
____ 21. If I shoot a bullet horizontally from 1 meter high and drop a ball from the same height, then they will land at the same time.
____ 22. The weight of an object is the acceleration of gravity times the mass.
____ 23. Kilograms is the typical measure of mass.
____ 24. Normal force is always equal to the weight of an object.
____ 25. Normal force is how hard the surface presses back up on an object.
____ 26. A diagonal force needs to be broken up into x and y-components.
____ 27. The x component of a velocity is found with .
____ 28. A free body diagram is a visual representation of forces on an object.
____ 29. Friction is a force that acts in the same direction of the motion.
____ 30. Gravity is calculated with the equation g=G m/r.

Short Answer (50 Points Each)

• A car accelerates from 0 m/s to 60 m/s in 4 seconds.
  How far did the car go in this time?
  How long did it take the car to go 10 meters? (Hint find the acceleration first)

• In your own words, what is the difference between velocity and acceleration?

• A car drives around a circular track with radius 20 meters in 12 seconds.
  What is the distance around the track?
  What is the linear speed of the car?
  What is the centripetal acceleration?

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Solutions

1 T 2 F 3 F 4 T 5 F 6 T 7 T 8 T 9 F 10 T
11 T 12 T 13 F 14 T 15 T 16 T 17 F 18 T 19 T 20 T
21 T 22 T 23 T 24 F 25 T 26 T 27 F 28 T 29 F 30 F

• 

• Velocity is the change in distance over time, but acceleration is the change in velocity over time. Accelerations can be thought of as m/s per second.

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