Question

1. A car, initially at rest, picks up a velocity of 72 km/h, over a distance of 25m. The acceleration of car is? 1) 10ms-> 2) Sms-2 3) 7ms- 4) 9ms-2 A wooden slab, starting from inolinad niane nf length 10m with 2.​

Answer 1

Answer:

1. 8 m/s^2

Explanation:

ATQ,

u (initial velocity) = 0

v (final velocity) = 72 km/hr

                          = 72 * 5/18 = 20 m/s

s = 25m

Applying third eqn. of motion

v^2 - u^2 = 2as

(20)^2 - 0 = 2*a*25

400 = 50a

a = 8 m/s^2

I didn't understand your second question.