Question

choose the right answer in the following
a body moving along a straight line at 20 m per second undergoes an acceleration of 4 metre per second square
after 2 seconds its speed will be
a)30m/s^2
b) 3m/s^2
c) 0. 83m/s^2
d) 18m\s^2

Answer 1

its simple, use the formula-------at=v-u
(4)(2)=v-20
v=8+20=28m/s

hope this helps!