Question

5. A particle is moving in a circular path of radius r. The displacement after half a circle would

be:

(a) Zero (b) πr (c) 2r (d) 2πz

6. A body is thrown vertically upward with velocity u, the greatest height h to which it will rise is,

(a) u/g (b) u

2

/2g (c) u

2

/g (d) u/2g

7. The numerical ratio of displacement to distance for a moving object is

(a) always less than 1

(b) always equal to 1

(c) always more than 1

(d) equal or less than 1

8. Suppose a boy is enjoying a ride on a merry-go-round which is moving with a constant speed of

10 m/s. lt implies that the boy is

(a) at rest

(b) moving with no acceleration

(c) in accelerated motion.

(d) moving with uniform velocity

9. Area under a v – t graph represents a physical quantity which has the unit

(a) m

2

(b) m (c) m

3

(d) m/s​

Answer 1

Answer:

the displacement is 2r as the radius is r and it covered half of the circular path so 2×r =2r