Chapter 4 Force and Motion - Test 3

1. In the absence of ______ the velocity can not move on the road

1) force
2) acceleration
3) Friction
4) Momentum
2. If the applied force 'F' on the block is increased gradually by adding more weights, friction also _____ and does not allow the block to move

1) decreases
2) finishes
3) Increases
4) remains the same
3. The value of Co efficient of kinetic friction depends on the nature of surfaces as well as on the ________ between the two surfaces

1) uniform velocity
2) relative velocity
3) average velocity
4) variable velocity
4. A body with wheels faces less friction as compared to a body of the _____ without wheels

1) all of the above
2) same size
3) large size
4) small size
5. Forces Fn and W act in opposite directions but their values are always

1) equal
2) greater
3) varies
4) less
6. When a wheel moves on a _____ surface, it has the contact with the surface only at a single point

1) scratchy
2) wrinkled
3) smooth
4) rough
7. Newton established the relationship between force and ______________

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8. Newton's first law of motion is also known as law of _______________

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9. Inertia is that characteristic of a body due to which it resist any change in its state of rest or of __________ motion.

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10. Action and "reaction" do not act on the same body but they act on two _______ bodies

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11. The direction of weight is towards the _____________

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12. The magnitude of force remains __________ every where in the stretched string..

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13. The _____ of a moving body is the product of its mass and velocity.

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