Worksheet – Collisions and Safety (Year 10 Physics) May 13, 2025May 14, 2025 Navu Full Name: Q1: What is the main reason rubber tiles are placed under swings in parks? To make the park look colourful To make it harder for children to fall To increase the stopping time when someone falls To bounce children back up Q2: Which of the following safety features in cars works in a similar way to rubber tiles under swings? Seat warmers Crumple zones Windshield wipers Alloy wheels Q3: According to the formula Force = Change in momentum ÷ Time taken, what happens to the force if the time taken to stop increases? The force increases The force stays the same The force decreases The force becomes negative Q4: An airbag inflates and stops a passenger’s head in 0.5 seconds. On a hard surface, stopping would happen in 0.05 seconds. Which gives a smaller force? Airbag Hard surface Both the same Cannot be determined Q5: Which of the following best describes how a crumple zone helps reduce injury in a crash? It makes the car bounce back It absorbs sound It increases the time taken for the car to stop It prevents the car from breaking Q6: A cyclist of mass 60 kg is moving at 5 m/s. If they come to a stop in 0.5 seconds, what is the force exerted? (Use Force = change in momentum ÷ time) 600 N 300 N 150 N 60 N Q7: A car crashes and its crumple zone increases the stopping time from 0.1 s to 0.4 s. What is the effect on the force experienced by the passengers? The force becomes four times bigger The force becomes four times smaller The force stays the same The force is zero Q8: Which of these statements about airbags is correct? Airbags increase the momentum of passengers Airbags stop the car from crashing Airbags reduce the force by increasing stopping time Airbags make the car go faster Q9: A ball of mass 2 kg hits the ground with a speed of 10 m/s and stops in 0.2 seconds. What is the average force acting on it? 10 N 20 N 50 N 100 N Q10: Why does increasing the time taken to stop reduce injuries? It increases the mass of the object It reduces the change in momentum It spreads out the force over a longer time It increases the speed of the object Submit