10th science unit-1 Motion
10th Science Model Question paper (New syllabus ) Samacheer kalvi
Time:1.15Hrs Marks - 50
I. Choose the best answer (5 × 1 = 5)
1. The momentum of a heavy object at rest will be __________.
a)large b)small c)infinity. d)zero
2. The SI unit of force is __________.
a)energy b)joule c)newton. d)dyne
3. Rocket works on the principle of __________.
a) conservation of mass
c) conservation of momentum
b) conservation of energy
d) conservation of velocity
4. Momentum is a __________ quantity.
a. vector b) scalar c) tensor d) none
5. Torque is a __________ quantity.
a) vector b) scalar c) tensor. d) either a ro b
II. Fill in the blanks (5 × 1 = 5)
6.Direction of motion is due to __________.
7. __________ proposed the concepts of force , motion and inertia of bodies.
8. Unit of momentum in CGS system is __________.
9.Torque = __________ × __________.
10. SI unit of G is __________.
III. State whether the statements are true or false.
Correct the false statement (4 × 1 = 4)
11. Rest and motion are not related terms.
12. Violent motion is a force dependent.
13. The unit of impulse and force is same.
14. If the resultant force of all the forces acting on a body is equal to zero, then the body will be in equilibrium. Such forces are called Unbalanced forces.
IV. Match the following. (4 × 1 = 4)
15. Force -(a)cause of motion
16. Moment of force -(b)momentum
17. Newton -(c)push or pull
18. m × v - (d)Torque
V. Assertion and Reasoning (3 × 1 = 3)
Direction: In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it.Of the statements given below,mark the correct answer as
a. If both A and R are true and R is the correct explanation of A.
b. If both A and R are true but R is not the correct explanation of A.
C.If A is true but R is false.
D.If both A and R are false.
19. Assertion: The sum of the clockwise moments is equal to the sum of the anticlockwise moments.
Reason: The principle of conservation of momentum is valid if the external force on the system is zero
20. Assertion: The resistance of a body to change its state of rest is called inertia of rest.
Reason: When you vigorously shake the branches of a tree, some of the leaves and fruits are detached and they fall down
21. Assertion : Torqueismeasuredbytheproductoftheforceandtheperpendiculardistancebetweenthefixed pointor the fixed axis and the line of action of the force.
Reason:Auto mobile sare fitted with springs and shock absorbers to reduce jerks while moving on uneven road.
VI. Write the answer for the following questions in word or sentence
22. What do you mean by force?
23. Who proposed the law of motion?
24. One of the irregularities in the motion of stars is called?
VII. Find the odd one out
25. Newton, Galileo, Aristotle, Einstein.
26. F = ₂ + F₂, F = F₁ – F₂, F = F₁ = F₂, R=0.
27. 980 dynes, 9.8 N, 105 dyne.
VIII. Correct the mistakes
28. Kinematics deals with the motion of bodies considering the cause of motion.
29. Inertia of rest is the resistance of a body to change its state of motion
30. Geometric radius of the Earth is Minimum in the polar region, the value of g is maximum.
IX. Write the short answer for ANY 5 of the following questions.
31.Definelinearmomentum.
32. What is Torque?
33.Define1Newton.
34. What is couple?
35. What is Impulsive force?
36. What is called apparent weight?
37. What is meant by weightlessness?
X. Write long answer for the following questions
38. Describe rocket propulsion.
[OR]
39 Explain the types of Inertia with examples.
40. Differentiate between Mass and Weight.
[OR]
41 Derive the relation between g and G.
10th Science important questions
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