Question

16. A car moved with a constant speed of 54 km/h on a straight road for 30 seconds. The
magnitude of acceleration of the car during those 30 seconds is
(A) 2m/s2
(B) 1.8 m/s (C) 0.5 m/s?
(D) zero

17. An object moves on a circular path of radius 28m and completes 3/4" of revolution. The
distance covered by the object is
(A) 132m
(B) 21m
(C) 114.7m
(D) zero

18.
The distance covered by a body is zero. then
(A) Displacement need not be zero
(B) Displacement must be zero
(C)Speed of the body cannot be zero
(D) Both a and C

19. A body covered a distance of 360m with a speed of 72 km/h, the time taken is
seconds
(A) 5
(B) 0.2
(C) 18
(D) 36

20.
A man started from his house and went towards right a distance of 12km then turned
right and travelled a distance of 6km again turned right and travelled a distance of 20km
and stopped. the magnitude of his displacement is
(A) 38km
(B) 42km
(C) 40km
(D) 10km​

Answer 1

Explanation:

I don't knew16th question

sorry

17. option A

18. option B

19. option C

20.option D