#### Laws of Motion Important Question Paper

10th Standard EM

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Science

Time : 01:00:00 Hrs
Total Marks : 50
10 x 1 = 10
1. Inertia of a body depends on

(a)

weight of the object

(b)

acceleration due to gravity of the planet

(c)

mass of the object

(d)

Both a & b

2. Newton’s III law is applicable

(a)

for a body is at rest

(b)

for a body in motion

(c)

both a & b

(d)

only for bodies with equal masses

3. The mass of a body is measured on planet Earth as M kg. When it is taken to a planet of radius half that of the Earth then its value will be____kg

(a)

4 M

(b)

2 M

(c)

M/4

(d)

M

4. If the Earth shrinks to 50% of its real radius its mass remaining the same, the weight of a body on the Earth will

(a)

decrease by 50%

(b)

increase by 50%

(c)

decrease by 25%

(d)

increase by 300%

5. To project the rockets which of the following principle(s) is /(are) required?

(a)

Newton’s third law of motion

(b)

Newton’s law of gravitation

(c)

law of conservation of linear momentum

(d)

both a and c

6. Physics that deals with the effect of force on bodies is

(a)

Kinematics

(b)

Dynamics

(c)

Statics

(d)

Mechanics

7. ______ deals with the bodies which are at rest under the action of forces.

(a)

Statics

(b)

Kinematics

(c)

Dynamics

(d)

Mechanics

8. Study of moving bodies under the action of forces ______

(a)

Statics

(b)

Kinematics

(c)

Dynamics

(d)

Mechanics

9. The resistance of a body to change its state of rest is called

(a)

inertia of rest

(b)

inertia of motion

(c)

momentum

(d)

inertia of direction

10. The resistance of a body to change its state of motion is called

(a)

force

(b)

momentum

(c)

inertia of motion

(d)

inertia of direction

11. 5 x 2 = 10
12. Define inertia. Give its classification.

13. Classify the types of force based on their application.

14. An athlete runs a certain distance before taking a long jump. Why?

15. What is Mechanics? Explain its branches.

16. What is meant by natural motion?

17. 5 x 3 = 15
18. Two bodies have a mass ratio of 3:4 The force applied on the bigger mass produces an acceleration of 12 ms-2.What could be the acceleration of the other body, if the same force acts on it.

19. A ball of mass 1 kg moving with a speed of 10 ms-1 rebounds after a perfect elastic collision with the floor. Calculate the change in linear momentum of the ball.

20. A mechanic unscrew a nut by applying a force of 140 N with a spanner of length 40 cm. What should be the length of the spanner if a force of 40 N is applied to unscrew the same nut?

21. What are the concepts prepared by Galileo?

22. Give the application of torque.

23. 3 x 5 = 15
24. What are the types of inertia? Give an example for each type.

25. State Newton’s laws of motion?

26. Deduce the equation of a force using Newton’s second law of motion.