- Describe the forces acting on a skydiver over time, from the moment she jumps out of the plane until hitting the ground and the effect this has on her velocity. What happens when she opens her parachute?
- A car travelling at 14 m/s has to make an emergency stop so applies the brakes and it takes 1.5s to become stationary. What distance has the van travelled in that time?
- A runner of weight 588N runs at a speed of 8 miles/hr. What is the kinetic energy of the runner? Determine the power exerted by the runner over a distance of 10m.
- How do you calculate efficiency?
- What is the resistance (in Ohms) of two 20 Ohm resisters in parallel?