Question

A 7 tonne truck initially moving at a velocity of 50m/s accelerates to 110m/s in 3 seconds
Calculate the force on the truck that causes the velocity to change

Answer 1

Mass = 7 tonne = 7000 kg

Acceleration = $\frac{Final Velocity - Initial Velocity}{Time}$ = $\frac{110 - 50}{3}$ = 20 m/s

Force = ?

[Force = Mass × Acceleration]

Force = 7000 × 20  (kg m/s)

          = 140000 kg m/s

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