Question

a car starts from rest and acquires a velocity of 54km/h in 2 sec. find the accelaration​

Answer 1

Answer:

97.2m/s²

Explanation:

acceleration=final velocity-initial velocity/time

a=54km/h -0 km/h/2sec

a=194.4m/s- 0m/s/2sec

a=194.4m/s/2sec

a=97.2m/s²

Answer 2

Given :-

A car starting from rest acquires a velocity of 54km/h in 5 seconds.

To find :-

• Acceleration

Solution :-

• Initial velocity (u) = 0

• Final velocity (v) = 54km/h

• Time taken (t) = 2s

→ Final velocity = 54km/h

→ v = 54 × 2/18

→ v = 3 × 2

→ v = 6m/s

According first equation of motion

→ v = u + at

→ 6 = 0 + a × (2)

→ 6 = 2a

→ a = 6/2

→ a = 3 m/s²

Hence,

• Acceleration of car is 3m/s²