Class 11th Physics Laws of Motion MCQ Test Online

Laws of Motion MCQ Test 1

Name: Class:

1. 1 A man is at rest in the middle of a pond on perfectly smooth ice. He can get himself to the shore by making use of Newton's

First law Second Law Third Law Law of gravitation

2. If the force of gravity suddenly disappears

The mass of all bodies will become zero The weight of all bodies will become zero Both the mass and weight of all bodies will become zero Neither mass nor weight of all bodies will become zero

3. When a horse pulls a wagon, the force that causes the horse to move forward is the force

He exerts on the wagon The wagon exerts on him The ground exerts on him He exerts on the ground

4. A particle is acted upon by a force given by (F = 12t+3t²) N , where t is in seconds. Find the change in momentum of that particle from t=1 to t=3 sec

70 55 74 51

5. In which of the following processes no force is needed

For uniform acceleration For uniform motion For linear motion To keep the momentum constant

6. A force of 10 N is applied to a mass of 10 Science gm for 10 seconds. The change of momentum in kgm/s units will be

10 1000 1000 0.01

7. A ball moving with a velocity 20m/s has a mass of 50gm. If collides against a wall normally and is rebounded normally with the same speed. If the time of impact of the ball and the wall is 40 mili seconds, the average force exerted on the wall in dynes is

zero 1.25×10⁷ 2.5×10⁷ 5×10⁶

8. In a circus a horse rider takes a vertically jump on a moving horse, and falls back on the horse because

the inertia of motion is present the length of the circus horse is large the motion is in circular path in reality the rider does not jump

9. Newton’s first law of motion is also known as:

Law of energy Law of inertia Law of momentum Law of acceleration

10. If a body of mass 5 kg is acted upon by a force of 10 N, what is its acceleration?

0.5 m/s² 2 m/s² 5 m/s² 10 m/s²