HARD
AS and A Level
IMPORTANT
Earn 100

A strongman drags a stone ball from rest along a horizontal surface. He moves it 10 m in 4 s by exerting a constant force of 100 N. Find the mass of the stone ball.

Important Questions on Force and Motion in One Dimension

HARD
AS and A Level
IMPORTANT
A car and driver, of total mass 1350 kg, are moving at 30 ms-1 on a horizontal road when the driver sees roadworks 400 m ahead. She brakes, decelerating with a constant force of 600 N until arriving at the roadworks. Find the time elapsed before arriving at the roadworks.
HARD
AS and A Level
IMPORTANT
A train travelling at 30 m s-1 on a horizontal track starts decelerating 360 m before coming to rest at a platform. The brakes provide a constant resistance of 100 kN. Find the mass of the train.
HARD
AS and A Level
IMPORTANT
A block is being dragged along a horizontal surface by a constant horizontal force of size 45 N. It covers 8 m in the first 2 s and 8.5 m in the next 1 s. Find the mass of the block.
EASY
AS and A Level
IMPORTANT
A boat and the sailor on it have a combined mass of 300 kg. The boat's engine provides a constant driving force of 100 N. It maintains a constant speed despite water resistance of 60 N and air resistance. Find the magnitude of the air resistance.
EASY
AS and A Level
IMPORTANT
A boy and his friends have a tug-of-war with his father. His father pulls on one end of the rope with a force of 200 N. The boy and three friends each pull with equal force on the other end of the rope. The rope is in equilibrium. Find the force each child exerts on the rope.
MEDIUM
AS and A Level
IMPORTANT
A team of sailors pulls a boat over the sand to the sea. Each sailor is capable of providing a force of up to 300 N. The resistance from the sand is 2200 N. Find the minimum number of sailors needed on the team to maintain a constant speed.
MEDIUM
AS and A Level
IMPORTANT
A cyclist and her bike have a combined mass of 80 kg. She exerts a driving force of 200 N and experiences air resistance of 150 N. Find the acceleration of the cyclist.
MEDIUM
AS and A Level
IMPORTANT
A car of mass 1500 kg experiences air resistance of 450 N. It accelerates at 3 m s-2 on horizontal ground. Find the driving force exerted by the engine.