Question

i) Convert 45 m/s into km/hr.

ii) If a body is moving with velocity 20m/s and body covers 100 meter distance and final velocity becomes 40 m/s then find the acceleration of the body.​

Answer 1

Answer:

i) 12.5 km/hr

ii) 6 m/s²

Explanation:

i) 45 x 5/18 = 12.5 km/hr

ii) u= 20 m/s

v= 40 m/s

s= 100 m

a= ?

v²= u² + 2as

(40)²=(20)²+ 2(a)(100)

1600= 400+ 200a

1200= 200a

a= 6 m/s²