Question

A powerful motorcycle can accelerate from rest to 20 m/s in only 4 seconds ; how far does it travel in that time?

Answer 1

u = 0

v = 20 m/s

t= 4sec.

by using first equation of motion

v= u+at

20= 0+4a

20= 4a

20/4=a

5m/s^2=a

by using 3rd equation of motion

v^2-u^2=2as

20×20 - 0 = 2 × 5 × s

400 = 10s

400/10= s

40 m = s

hope it helps u

Answer 2

s=1/2gt^2
s=1/2×5×16
s=40 metre