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#### Force and Motion Model Question Paper

7th Standard EM

Reg.No. :
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Science

Time : 01:30:00 Hrs
Total Marks : 50
3 x 1 = 3
1. A particle is moving in a circular path of radius r. The displacement after half a circle would be

(a)

Zero

(b)

R

(c)

2 r

(d)

r / 2

2. Distance travelled by a body in a given time

(a)

is always positive

(b)

can be zero or positive

(c)

is always negative

(d)

either (a) or (c)

3. The slope of a velocity-time graph gives _______

(a)

velocity

(b)

distance

(c)

displacement

(d)

acceleration

4. 5 x 1 = 5
5. The shortest distance between the two places is ______

()

displacement

6. If the velocity of an object increases with respect to time, then the object is said to be in__________ acceleration.

()

positive

7. In ___________ equilibrium its centre of gravity remains at the same height when it is displaced.

()

neutral

8. The SI unit of displacement is _____________

()

metre (m)

9. Distance is a ___________ quantity.

()

scalar

10. 5 x 1 = 5
11. Displacement

12. (1)

Larger base area

13. Speed of ship

14. (2)

Metre

15. Stability

16. (3)

Not possible.

17. Uniform motion.

18. (4)

Equal distances covered in equal intervals of time

19. The velocity-time graph is a circle

20. (5)

Knot

1 x 5 = 5
21. A car started from rest and travelling with velocity of 20 m /s in 10 s. What is its acceleration?

22. 5 x 2 = 10
23. All objects having uniform speed need not have uniform velocity. Describe with the help of examples.

24. Give one example where the displacement is zero but the distance travelled is not zero

25. Give some examples for vector quantity

26. Give one example for uniform acceleration

27. What are three types of stability of an object?

28. 4 x 3 = 12
29. Distinguish between speed and velocity.

30. What is centre of gravity ?

31. Define speed Mention its formula and unit.

32. What is stability? Mention its types.

33. 2 x 5 = 10
34. Explain the types of stability with suitable examples.

35. Write the differences between distance and displacement