Newton’s 2nd Law – Practice Questions:1) A 120kg wheelbarrow is accelerated at 0.45 m/s^{2}. 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/s^{2}. What is the force exerted by the muscles of the ferret?4) A rocket accelerates from its launch at 0.8 m/s^{2}. The force exerted on the rocket is 104 kN. What is the mass of the rocket at launch? Quick Answers: 1) 54N2) 200N3) 0.16N left4) 130000kg (130 tonnes) Worked Answers: