Grade Lo Physic Extra Practice Boatatet erm 3 Finals s 6 When a body 4 exerts a
ID: 1639702 • Letter: G
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Grade Lo Physic Extra Practice Boatatet erm 3 Finals s 6 When a body 4 exerts a force a B exerts on a body B then we can say that (select one correct answer) b B exerts a force on A equal in magnitude but opposite in direction no c B exerts a force e un any direction and in the same direction on A greater in magnitude Concept 14: know that solid surfaces exert two types of forces 7 When a body is pulled alo a rough horizontal surface it will experience a force FSA What is the component of Frn that is perpendicular to the surface? What is the component of Fsm that is tangent to the surface? s A desk is being pushed across the floor with a force F as shown in the diagram below i What is the force t acting from the floor? Desk Floor What is the force x acting opposite to F? iit The sum of the reactions, R, of the floor to the motion of the desk can be stated as: 9 What two types of forces are exerted by solid surfaces? Concept 18: Effect of NO force on a moving body horizontal 10 When no horizontal force acts on a body, the body moves with a velocity l I. When a moving body is not subjected to any external forces, how can we describe the motion of the body? (select one correct answer) a It will decrease its speed not change b. The motion of the body will c. It will increase its velocityExplanation / Answer
6.The answer is (a) in accordance with Newton's Third law of Motion
7. The component normal to the body is the normal reaction which is genrally the weight of the body
The component tangent to the body is the frictional force.
8. Performing a force balance in the vertical direction, the force t is the normal reaction and is equal to the weight W of the body.
x is the friction force which equals F if the block isn't accelerating.
yes the answe is (c)
9. reaction forces and friction forces
10. Constant horizontal velocity.
11. (b) the motion of the body won't change. Newton's 1st law being in play here.
12. Velocity. It has been explained above.
13. Newtons first law: An object at rest remains at rest and an object in motion moves with a constant velocity unless acted by any unbalanced external force.
14. Law of inertia
15. Inertia is the tendency of a body to remain in a state of rest or in motion.
16. Since it is moving with a constant speed so acceleration is zero and hence net force is zero.
17. Answer is (a) as explained above.
18. Mass is the amount of matter contained in a body. In context of motion, it is the measure of inertia.
PS: Please don't post too many questions as one single question. it is hard for us to give time and solve for all the questions at once.
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