Question

1. The S.I. unit of force is
I. Kgm/s
II. Kgm/s2
III. Newton
IV. Newton-meter

(III)

2. What do we get by the product of mass and velocity?
I. Force
II. Inertia
III. Momentum
IV. Newton

(III)

3. The rate of change of momentum of an object is proportional to
I. Mass of the body
II. Velocity of the body
III. Net force applied on the body
IV. None of these

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4. If two balls of same masses are dropped on sand, the depths of penetration is same if
I. Heavier ball is dropped faster than lighter ball
II. Lighter ball is dropped faster than heavier ball
III. The product ‘mv’ is same for both bodies
IV. None of these

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5. A coin placed on a card(rested at the edges of the glass) remains at rest because of
I. Inertia of rest
II. Two forces act on the coin which balance each other
III. No unbalanced force acts on it
IV. All of these

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6. A force of 50N moves a body,
I. Friction force exerted on the body is less than 50N
II. Friction force exerted on the body is more than 50N
III. None of these
IV. Both of I and II

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7. A fielder giving a swing while catching a ball is an example of
I. Inertia
II. Momentum
III. Newton’s II law of motion
IV. Newton’s I law of motion


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8. Action and reaction forces
I. Act on the same body
II. Act on different bodies
III. Act in same direction
IV. Both I and III


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9. When we pedaling the bicycle it stops because
I. The earth’s gravitational force acts on it
II. It is not accelerated
III. No unbalanced force acts on it
IV. Frictional force acts on it

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10. A football and a stone has same mass
I. Both have same inertia
II. Both have same momentum
III. Both have different inertia
IV. Both have different momentum

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Answer 1

Answer:

1. Newton meter
2. momentum
3. mass of the body
4. The product of (mv) is same for both bodies
5. Inertia of rest
6. none of that
7. inertia
8. both l and ll
9. frictional force acts on it
10. both have same inertia

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Answer 2

3. Net force applied on body
4. Momentum is same
5. All of these
6. Force of friction is less
7. Newtons second law
8. Act of different bodies
9. Friction acts on it
10. Both have same inertia