Calculate the force needed.

Question

A cement lorry with a mass of 15000kg takes 25s to accelerate from 5.0ms^-1 to 22ms^-1. Calculate the force needed to do his.

Answer 1

Final Velocity Is Initial Velocity Plus

Acceleration Multiplied By

Time Between First & Last Velocity.

That is, V_final = V_initial + AT or

22 meters per second =

5 meters per second + A(25 seconds).

Then acceleration a is

(22 − 5) m/s

***************

25 s

or 17/25 meters per second every second or 0.68 m/s².

Take the Force sought as Mass Times Acceleration or

1.5E4 kilograms × 0.68 meters per second squared

or 10200 kg•m/s² or 1.02E4 Newtons.