# Newtons Laws of Motion

1. Why is it more difficult to bring to a stop a heavy commercial vehicle than a salon car even when both are travelling at the same velocity?

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2. Describe what shall happen to a body moving in a straight line acted upon by forces in equilibrium (forces acting on it are balanced)?

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3. Mention the of the apparent weight, P, of a body in a lift that is accelerating downwards?

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4. Mention the SI UNIT of momentum?

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5. The property of bodies to resist change in a state of motion is called?

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6. Mention the formula of the apparent weight, P, of a body in a lift that is accelerating upwards?

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7. Impulse = Force x Time

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8. The frictional resistance to motion in fluids is called?

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9. Terminal velocity is the constant velocity attained when an object falling in liquid has its sum of upward forces equal to the weight of the object?

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10. Mention the 2 types of collisions which can happen to two bodies that collide according to the law of conversation of momentum?

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11. Which of the following is NOT a disadvantage of friction?

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12. Which types of force occur when 2 moving bodies collide e.g. when two moving cars collide head on?

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13. State the mathematical expression of Newtons second Law

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14. Define the law of inertia.

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15. Stoke's law states that when the radius of an object i.e. ball is small compared to the extent of liquid surface the ball does not create turbulence in the liquid as it falls?

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16. The nature and condition of the surfaces in contact have an effect on the limiting frictional force i.e. sand paper verses glass.

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17. Mention the beneficial applications of friction

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18. The formula, F + u = mg , best describes the conditions for the occurrence of what phenomenon?

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19. Impulse force can either be large or small depending on the change of velocity (momentum) on the moving body?

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20. Give 2 characteristics when two bodies are involved in inelastic collision?

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21. Which of the following is a CORRECT definition of the impulse force?

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22. What is the name of the force which acts on a body for a very short time?

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23. Name the 3 types of forces which act on a body as it moves in a liquid

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24. Which of the following statements is INCORRECT about impulse force?

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25. Which of the following can occur for system of colliding bodies after collision according to the law of conservation of momentum?

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26. Define the law of conservation of linear momentum?

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27. Which Newton's law states that a body remains in its state of rest or uniform motion in a straight line unless acted upon by an external force.

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28. Which of the following statements is CORRECT about Newton's 3rd Law?

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29. The change of momentum is equal to impulse i.e. Ft= mv-mu

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30. Automobiles have seat belts in order to curb inertia. True or False?

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31. Which of the following statements is INCORRECT about the law of conservation of linear momentum?

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32. Momentum has both Magnitude and direction?

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33. Momentum is what type of quantity?

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34. Mention the notable advantage(s) of friction

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35. Which of the following statement is TRUE about terminal velocity when a body is falling in a liquid?

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36. Name the type of collision in which both kinetic energy and momentum are conserved?

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37. Kinetic friction is the force acting between 2 surfaces which are in contact and in relative motion?

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38. Which Newton's law states: The rate of change of momentum of a body is directly proportional to the resultant external force producing the change and takes place in the direction of the force.

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39. Which of the following statements is TRUE concerning kinetic friction?

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40. What are Newton's Laws based on?

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41. Which Newtons law states that action and reaction are equal and opposite?

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42. Which of the following is not among some of the methods used to minimize friction?

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43. The following formula is used to describe which Newton's Law of motion? F is proportional to m(v-u)/t

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44. The larger the mass the greater the inertia and vice-versa?

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45. Mention the formula of the apparent weight of a body in a lift that is at rest?

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46. Define Momentum

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47. What phenomenon best describes the occurrence when a bus surges forward and all passengers are jerked backwards?

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48. State the SI UNIT of impulse is Ns. True or False?

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