Question

A train starts from rest and accelerates uniformly for 30 second to attain a velocity of 72 km/hr. Find its acceleration

Answer 1

a = 2.4 . the formula is accleration =change in velocity ÷ time taken

Answer 2

Given : A train starts from rest and accelerates uniformly for 30 second to attain a velocity of 72 km/hr.

　

To find : What is its acceleration.

　

Applying formula :

★ Acceleration = Final velocity - Initial velocity/Time.

　　　　　　　　　　Or

★ a = v - u/t.

　

Calculations :

→ a = 72 - 0/30

→ a = 72/30

→ a = 2.4 m/s

　

Therefore, 2.4 m/s is the required acceleration.