8.5 Vehicle safety

Question 1

What is the effect on the impact force if the contact time is shorter?

Answer 1

» The greater the impact force
» For the same initial velocity

Question 2

What equation can be used to find the impact time?

Answer 2

» S = 1/2(u+v) x t

Question 3

What is the impact time?

Answer 3

» The duration of the impact force

Question 4

What is the equation which links kinetic energy and impact force?

Answer 4

» Impact force = change of kinetic energy/impact distance