Question

1 .A particle is moving up an inclined plane. Its velocity changes from 30m/s to 10m/s in two

seconds. What is its acceleration? (-10m/s2

)

2 The velocity changes from 45m/s to 60m/s in Three seconds. What is its acceleration? (5m/s2

)

3. A Truck covers 30km at a uniform speed of 30km/hr. what should be its speed for the next

90km if the average speed for the entire journey is 60km/h? (90 km/hr)

4. John runs for 10 min. at a uniform speed 9km/h. At what speed should he run for the next 20

min. so that the average speed comes 12km/hr? (Ans: 13.5 km/hr)

5. An object moves along a circular path of diameter 14cm with constant speed. If it takes 2 min.

to move from a point on the path to the diametrically opposite point. Find

(a) The distance covered by the object (22CM)

(b) The speed (0.18CM/S)

(c) The displacement (14CM)

(d) average velocity (0.11CM/S)

6. Define scalar and Vector quantities. Give 2 examples each.

7. How rest and motion are relative terms. Give one example.

8. A particle covers equal distances in equal time intervals, it is said to be in __________

9. (a) Identify the kind of motion in the following cases:

(i) A car moving with constant speed turning around a curve.

(ii) An electron orbiting around nucleus.

(b) An artificial satellite is moving in a circular orbit of radius 36,000 km. Calculate its speed

if it takes 24 hours to revolve around the earth.

​

Answer 1

Answer:

that's easy if you have read the chapter