Newton’s 2nd Law – Practice


1) A 120kg wheelbarrow is accelerated at 0.45 m/s2. Calculate the force acting on the wheelbarrow:

2) A 0.05kg tennis ball is accelerated by a ball launcher with a force of 10N. Calculate the magnitude of the acceleration of the ball:

3) A 400gm ferret accelerates to the left at 0.4 m/s2. What is the force exerted by the muscles of the ferret?

4) A rocket accelerates from its launch at 0.8 m/s2. The force exerted on the rocket is 104 kN. What is the mass of the rocket at launch?

Quick Answers:

1) 54N

2) 200N

3) 0.16N left

4) 130000kg (130 tonnes)

Worked Answers: