Question

A truck covers 40.0 m in 8.40 s while uniformly slowing down to a final velocity of 1.50 m/s.

(a) Find the truck's original speed.

(b) Find its acceleration.
m/s²

Answer 1

a) Trucks original speed or initial speed can be find using below two formulas

V=u+at

S=ut+1/2at²

Where u=initial speed or original speed

V= final speed

a= accelartion

S= distance covered

t= time

b)acceleration of truck can be find using the formula

V=u+at

a)original speed, u=8.024 m/s

b)acceleration, a= -0.78 m/s^{​​​​​​2}