Question

A body starts from rest and travels for five seconds to make a displacement of 25 m if it ha
travelled the distance with uniform acceleration a then a is
(a) 3 m/s2
(b) 4 m/s2
(c) 2 m/s2
(d) 1 m/s2

Answer 1

The correct optionis  (c)2m/s

Given:

u=0

t=10sec

To find : a=?

solution,

by using equation of kinematics

we have,

s = ut+$\frac{1}{2}$a$t^{2}$

25 = 0*5 + $\frac{1}{2}$a$t^{2}$

a =  $\frac{25*2}{5*5}$

a = 2m/s

Answer 2

Answer:

Its option c 2m/s^2

Explanation:

using equation of kinematics,

s=ut+1/2at^2

given: s=25m,u=0,t=5s

substitue the values,

25=0*5+1/2a(5*5)

25=1/2a(25)

50=a(25)

a=50/25

a=2m/s^2