Question

SINGLE CORRECT OPTION TYPE
Question 7
A car acquires a velocity of 72 km/hr in 20 sec just after the start. Calculate the average acceleration of the car
o|
1m/s2
o
2m/s?
o
Зm/s2
o
4m/s2​

Answer 1

Answer:

Explanation:

velocity=72 Km/hr =72*5/18=20 m/s

time=20 sec

acceleration=total velocity/total time

                     = 20 m/sec /20 sec

                   =    1 m/s2

Answer 2

Explanation:

(72×5)/18=20m/s.

now a=(v-u)/t.

v is final velocity and u is initial velocity and t is time

u=0 as it starts from rest

a=(20-0)/20

a=1 m/s^2.