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- 1. Multiple Choice
An eraser rubbing across a sheet of paper is an example of which type of friction?staticslidingrollingfluid - 2. Multiple ChoiceTwo students pull on the opposite ends of a rope, but neither student is able to move the other. Which statement best explains why neither student is moved?The each pull on the rope with the same amount of force, so the net force is zero.They each exert the same amount of friction against the ground, so the net friction is zero.Their forces are not balanced, but gravity keeps them from movingThe two students have the same mass.
- 3. Multiple ChoiceA horizontal force of 24 N is being applied to a box on a level surface. The box is accelerating at the rate of 2.0 m/s2 against a frictional force of 14 N. What is the mass of the box?5.0 kg7.0 kg12.0 kg19 kg
- 4. Multiple ChoiceA student pushes a book with a force of 5 N to the east. Which statement describes the reaction force?5N eastward, acting on the book5N westward, acting on the book5N eastward, acting on the student5N westward, acting on the student
- 5. Multiple ChoiceA 3.0 N force and a 5.0 N force are acting in opposite directions on the same 5.0 kg ball. What is the magnitude of the acceleration of the ball?0.40 m/s20.63 m/s21.6 m/s22.5 m/s2
- 6. Multiple ChoiceStudent X pushes a 10 N box with a force of 2 N towards Student Y. At the same time, Student Y pushes the same box with a 6 N force in the opposite direction. Which would most likely occur?The resultant force on the box would be 8 N.The resultant force on the box would be 18 N.The box will move toward Student X.The box will move toward Student Y.
- 7. Multiple ChoiceThe force acting on an object is decreased to half its initial value after the mass of the object is doubled. Which statement best describes the resulting change in acceleration of the object?The acceleration is decreased to one-fourth of its initial magnitudeThe acceleration is decreased to one-half of its initial magnitude.The acceleration is increased to twice its initial magnitude.The acceleration is increased to four times its initial magnitude.
- 8. Multiple ChoiceThe action of swimmers using their arms to generate action and reaction forces which propel themselves through the water is an example of what law?Newton’s First Law of MotionNewton’s Third Law of MotionLaw of Conservation of Linear MomentumLaw of Conservation of Angular Momentum
- 9. Multiple ChoiceWhen a hammer strikes a nail, the nailexerts balanced forces that helps it from moving.exerts a force equal to the weight of the hammer.exerts an unbalanced force that changes its velocity.exerts an equal and opposite force back on the hammer.
- 10. Multiple ChoiceWhich object will have the greatest acceleration if acted upon by a net force of 100 N?5-kg object25-kg object50-kg object100-kg object
- 11. Multiple ChoiceThe property of matter that resists changes in motion is calledinertia.friction.gravity.weight.
- 12. Multiple ChoiceBrakes on a car are designed to use friction to slow or stop a vehicle. Brake shoes and pads are lined with a heat-resistant material that presses against rotating disks or drums. Which type of frictional force causes a car to decelerate when the brakes are applied?FluidRollingSlidingStatic
- 13. Multiple ChoiceA hockey stick applies a force to a puck that results in an acceleration of 3.0 m/s2. What would be the effect on the acceleration on the hockey puck if the force is tripled?The acceleration would remain the same.The acceleration would be reduced to 1.0 m/s2.The acceleration would be increased to 6.0 m/s2.The acceleration would be increased to 9.0 m/s2.
- 14. Multiple ChoiceWhat is the net force on the box?7 N up8 N up8 N down22 N down
- 15. Multiple ChoiceWhich of the following is an example of balanced forces?ABCD
- 16. Multiple ChoiceA sailboat accelerates at a rate of 2 m/s2 and has a mass of 800 kg. What is the net force acting on the sailboat?400 N800 N1200 N1600 N
- 17. Multiple ChoiceThe name that we give to the force that opposes motion isaccelerationfrictiongravitymass
- 18. Multiple ChoiceWhich of the following would not change the amount of friction present between the surface of an object and the ground?changing the texture of the surfaceadding wheels to the objectpainting the object a different coloradding more mass to the object
- 19. Multiple ChoiceYou are pushing on a box with 700 N of force. The force of friction is 50 N. What is the net force on the box?600 N650 N700 N750 N
- 20. Multiple ChoiceA student pushes on a crate with 100 N of force directed to the right. What force does the crate exert on the student?100 N to the right100 N to the left. 980 N to the right980 N to the left
- 21. Multiple ChoiceWhich has more inertia?1000 kg car moving 1 m/s70 kg person sprinting at 8 m/s2500 kg elephant sitting by the pond300 kg boulder rolling at 3 m/s
- 22. Multiple ChoiceWhich has more momentum?1000 kg car moving 1 m/s70 kg person sprinting at 8 m/s2500 kg elephant sitting by the pond300 kg boulder rolling at 3 m/s
- 23. Multiple ChoiceOn Earth, the Mars rover had a weight (force due to gravity) of 9800 N. What will be its weight (force due to gravity) on Mars where the acceleration due to gravity is 4 m/s2?1000 N2000 N3000 N4000 N
- 24. Multiple ChoiceWhy does the weight of an object change with increasing elevation on Earth?The mass of the object decreases with higher elevation.The force of gravity acting on the object increases with higher elevation.The force of gravity acting on the object decreases with higher elevation.The mass of the object increases with higher elevation
- 25. Multiple ChoiceA Mars rover has been sent to explore and relay data from Mars. Mars is less massive than Earth. When compared to the Earth, which is the best comparison between the mass and the weight of the Rover on Mars?The mass is more on Mars and the weight is less.The weight is less on Mars and the mass is less.The weight is less on Mars and the mass is the same.The mass is less on Mars and the weight is the same.
- 26. Multiple ChoiceA ball is dropped and hits the ground in 1.5 s with a final speed of 15 m/s. How would the acceleration and final speed of the ball be affected if it were dropped from a greater height on Earth.Its final speed would remain the same because its rate of acceleration would remain the same.Its final speed would increase because its rate of acceleration would remain the same.Its final speed would remain the same because its rate of acceleration would decrease.Its final speed would increase because its rate of acceleration would increase.
- 27. Multiple ChoiceAn object of mass 30 kg is in free fall in a vacuum on Earth where there is no air resistance. What is the acceleration of the object?9.8 m/s230 kg294 Nnot enough information given
- 28. Multiple ChoiceA 50 kg skydiver reaches terminal velocity before opening her parachute. What is the force of air resistance? (Hint: W=mg)0 N9.8 N490 N980 N
- 29. Multiple ChoiceWith what force will a car hit a tree if the car has a mass of 3000 kg and it is accelerating at a rate of 2 m/s2?1500 N3000 N4500 N6000 N
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