What do crumple zones do in cars?

Why do car safety features extend the time of collision?

If velocity is negative what is the direction of travel?

Why are recoil velocities negative?

What is Newton’s Second Law?

What is the acceleration formula?

What is m∆v?

What is ∆t?

How can we combine Newton’s Second Law and the acceleration formula?

What force is needed to get a 30 kg stationary bicycle moving at 12 m/s in 5 s?

What force is needed to get a 70 kg stationary man moving at 8 m/s in 10 s?

A 1000 kg car accelerates from rest to a velocity of 50 m/s in 55 seconds. What is the force acting on the car?

A 1,500 kg car accelerates from rest to a velocity of 30 m/s in 20 seconds. What is the force acting on the car?

A van of mass 5,000 kg travelling at 10 m/s collides with a stationary car. The vehicles move off with a velocity of 6 m/s, so what is the mass of the car?

A cannon fires a 10 kg cannonball at 100 m/s and recoils at a velocity of 2 m/s. What is the mass of the cannon?

A shotgun of mass 3 kg fires a bullet of 0.1 kg at a velocity of 250 m/s. What is the recoil velocity of the gun?

A boy of mass 50 kg on ice skates throws a ball of 1 kg in front of him at a velocity of 2.5 m/s. In which direction will he move?

A boy of mass 50 kg on ice skates throws a ball of 1 kg in front of him at a velocity of 2.5 m/s. At what velocity will he move?

A car of mass 1000 kg travelling at 20 m/s collides with a stationary car of mass 1000 kg. The vehicles move together after impact. Calculate their velocity.

A car of mass 2000 kg travelling at 5 m/s collides with a stationary car of mass 500 kg. The vehicles move together after impact. Calculate their velocity.

A 12,000 kg lorry travelling at 2 m/s collides with a stationary car of mass 1500 kg, and the vehicles move together after impact. What is their velocity?

A lorry of mass 12,000 kg travelling at 15 m/s crashes into a moving car of mass 1500 kg, travelling at 5 m/s. The vehicles move together after impact – what is their velocity?

A car of mass 1500 kg travelling at 10 m/s crashes into a car of mass 1500 kg travelling at 5 m/s The vehicles move together after impact – what is their velocity?

A cannon of mass 300 kg, with a 5 kg cannonball is fired. The ball moves with a velocity 50 m/s. Calculate the recoil velocity of the cannon.

A cannon of mass 200 kg, with a 10 kg cannonball is fired. The ball moves with a velocity 80 m/s. Calculate the recoil velocity of the cannon.

A pistol of 0.5 kg fires a 0.05 kg bullet at 300 m/s. Calculate the recoil velocity of the gun.

A railway carriage moving at 5 m/s and mass 14,000 kg collides with a stationary railway carriage. What is the total momentum after the collision?

A railway carriage moving at 5 m/s and mass 14,000 kg collides with a stationary railway carriage. What is the total momentum before the collision?