Forces, Newton's laws and free-body diagramsEdexcel A-Level Physics: Mind map

Exam questions on Forces, Newton's laws and free-body diagrams

1. A book of mass 0.80 kg rests on a horizontal table.
   Calculate the weight of the book and explain, using Newton's first law, why the contact force from the table has this same size.2 marks
2. A car of mass 1200 kg accelerates in a straight line from rest along a level road. Its engine produces a driving force of 3600 N and the resistive forces on the car total 600 N.
   At a higher speed the resistive forces rise to 3600 N while the driving force is unchanged. Describe and explain the motion of the car from this point.2 marks
3. A skydiver of mass 80 kg falls vertically with her parachute closed. At one instant her speed is 30 m s⁻¹ and the air resistance on her is 360 N.
   Calculate the acceleration of the skydiver at this instant.3 marks