Force and Laws of Motion — Advanced

Grade 9 Science — Force and Laws of Motion — Advanced: 25 practice questions with instant scoring and explanations.

1. Momentum is defined as:
2. The SI unit of momentum is:
3. A 5 kg object moving at 4 m/s has momentum of:
4. The law of conservation of momentum states that:
5. In a collision between two objects, momentum is conserved if:
6. Impulse is defined as:
7. A force of 10 N acts on an object for 5 seconds. The impulse is:
8. When catching a ball, why is it better to move your hand backward rather than keeping it still?
9. Static friction acts when:
10. Kinetic friction is typically:
11. Friction depends on:
12. The coefficient of friction (μ) is:
13. Friction on an inclined plane depends on:
14. Rolling friction is:
15. A 2 kg object moving at 3 m/s collides with a stationary 2 kg object. If they stick together, their final velocity is:
16. A free body diagram shows:
17. An object on an inclined plane at angle θ has a component of weight parallel to the plane of:
18. A ball of mass 0.5 kg moving at 6 m/s is brought to rest in 0.2 s. The average force is:
19. Impulse-momentum theorem states that:
20. In an elastic collision:
21. In a perfectly inelastic collision:
22. Air resistance on a falling object increases until:
23. If two objects have the same momentum but different masses, the lighter object has:
24. A 10 kg object experiences a friction force of 40 N. The coefficient of kinetic friction is:
25. The normal force on a 20 kg object on a horizontal surface is: