Question

A body moving with an initial velocity 5ms-1 and accelerates at 2ms-2. Its velocity after 10s is a) 20ms-1 b) 25ms-1 c) 5ms-1 d) 22.55ms-1

Answer 1

initial velocity , u = 5 m/s
acceleration , a = 2 m/s²
we have to find velocity after 10sec ,
you know about kinetic equation of linear motion ?
v = u + at ,is a Kinetic equation for linear motion. where , v is velocity after t time , u is intial velocity and a is acceleration.

here, u = 5m/s , a = 2 m/s and t = 10sec
v = 5 + 2 × 10
= 25 m/s

hence, option (b) is correct

Answer 2

Answer:

25m/s

Explanation:

Use

v=u+at

v=5+2*10

v=25