Motion and Forces
GCE Physics

a) State Newton's three laws of motion. (3 marks) b) A car of mass 1200 kg is moving along a straight horizontal road at a velocity of 30 m/s. The driver applies the brakes and the car decelerates un…

a) Define the following terms as used in circular motion: i) Angular velocity (1 mark) ii) Centripetal acceleration (1 mark) b) Derive an expression for the centripetal force acting on a body o…

A stone is thrown horizontally from the top of a cliff 45 m high with a velocity of 10 m/s. How far from the base of the cliff does the stone land? [g = 10 m/s²]

An object of mass 5 kg is placed on a rough horizontal surface. If the coefficient of kinetic friction between the object and the surface is 0.4, what is the frictional force opposing the motion of th…

A rocket of mass 500 kg ejects gas at a rate of 10 kg/s with an exhaust velocity of 800 m/s relative to the rocket. What is the thrust force produced by the rocket engine?

A car of mass 1200 kg accelerates uniformly from rest to a velocity of 20 m/s in 8 seconds. What is the net force acting on the car?

A car travelling at 30 m/s applies its brakes and decelerates uniformly at 5 m/s². What distance does the car cover before coming to rest?

A body of mass 2 kg is suspended by two strings making angles of 30° and 60° with the vertical respectively. If the system is in equilibrium, what is the tension in the string making 30° with the vert…

A satellite orbits the Earth at a height where the gravitational acceleration is 8 m/s². If the radius of the orbit is 6.7 × 10⁶ m, what is the orbital speed of the satellite?

A ball of mass 0.5 kg moving at 6 m/s collides with a stationary ball of mass 1.5 kg. If they stick together after collision, what is their common velocity?

A body is in equilibrium under the action of three coplanar forces. Which of the following conditions must be satisfied?