Question

A body starts rest and moves with a uniform accelaration of 2m/s2 in straight line

a. what is its velocity after 5s?

b.how far has it travelled in this time?

c.when will it be 100m from the starting point?

Answer 1

(a)

$$v=v_0+at=0+2*5=10\:\rm m/s$$

(b)

$$d=v_0t+at^2/2=0*5+2*5^2/2=25\:\rm m$$

(c)

$$t=\sqrt{\frac{2d_1}{a}}=\sqrt{\frac{2*100}{2}}=10\:\rm s$$