impact forces and safety features

Question 1

what is the effect on the impact force when the impact time is longer?

Answer 1

the longer the impact time, the smaller the impact force will be

Question 2

what is the impact force equation?

Answer 2

force, F (N) = mass, m (kg) x change of velocity, Δv (m/s) / time taken, t (s)

Question 3

what is the acceleration equation?

Answer 3

acceleration, a (m/s^2) = change in velocity (m/s) / time (s)

Question 4

name 3 car safety features

Answer 4

seat belts, air bags, crumple zones

Question 5

what do seat belts do?

Answer 5

Seat belts stop you tumbling around inside the car if there is a collision. made of eleastic material. increases impact time, decreases impact force

Question 6

what do air bags do?

Answer 6

Air bags inflate w/ air. increases impact time, reduces impact force. They also act a soft cushion and prevent cuts.

Question 7

what do crumple zones do?

Answer 7

there’s a front and rear crumple zone. they are designed to crush in a controlled way in a collision. increases impact time, reduces impact force.