1When a bicycle has to be taken from rest and speeded up quickly, what difference in acceleration is there between the rider being alone and another person sitting behind the rider?
2On a smooth even road, what difference is there between the acceleration produced when the pedal is pushed with less force the first time and with more force the second time?
3State Newton's first law of motion and explain why it is called the law of inertia.
4What happens when the resultant force acting on an object is zero?
5Show how the equation F = ma is built from the proportionality relations between acceleration, force and mass.
6Define one newton of force.
7A car of mass 1200 kg was moving at 10 m/s. Moving with uniform acceleration it covered 60 m in 4 s. Find the resultant force acting on the car.
8In the experiment with the trolley, string, pulley and hook, what happens to the acceleration when masses are added to the hook, and when masses are added to the trolley?