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#### Term 1 Force and Motion 3 Marks and 5 Marks Questions

7th Standard EM

Reg.No. :
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Science

Time : 00:45:00 Hrs
Total Marks : 40
5 x 3 = 15
1. Show the shape of the distance – time graph for the motion in the following cases.
a. A bus moving with a constant speed.
b. A car parked on a road side.

2. Distinguish between speed and velocity.

3. What do you mean by constant acceleration?

4. What is centre of gravity ?

5. A train starting from a railway station and moving with uniform acceleration attains a speed of 40 km/h in 10 minutes. Find its acceleration?

6. 5 x 5 = 25
7. Explain the types of stability with suitable examples.

8. Write about the experiment to find the centre of gravity of the irregularly shaped plate.

9. Write the differences between distance and displacement

10. Draw velocity-time graph for the following data:
1. Bus at rest

 Time / s 0 1 2 3 4 5 Speed / ms-1 0 0 0 0 0 0

2. Bus travelling at uniform speed of m/s

 Time / s 0 1 2 3 4 5 Speed / ms-1 10 10 10 10 10 10

3. Bus travelling at uniform acceleration

 Time / s 0 1 2 3 4 5 Speed / ms-1 10 10 20 30 40 50

4. Bus travelling at uniform deceleration

 Time / s 0 1 2 3 4 5 Speed / ms-1 50 40 30 20 10 0

5. Bus travelling with increasing acceleration
(non - uniform acceleration)

 Time / s 0 1 2 3 4 5 Speed / ms-1 0 2 8 18 32 50
11. The motion of a car is given in the following data draw distance - time graph.
(a) Car at rest

 Time / s 0 1 2 3 4 5 Speed / ms 0 20 20 20 20 20

(b) Car travelling at uniform speed of 10 ms-1

 Time / s 0 1 2 3 4 5 Speed / ms 0 10 20 30 40 50

(c) Car travelling at increasing speed

 Time / s 0 1 2 3 4 5 Speed / ms 0 5 20 45 80 125

(d) Car travelling at decreasing speed

 Time / s 0 1 2 3 4 5 Speed / ms 0 45 80 105 120 125