Momentum

Question 1

Equation for momentum

Answer 1

• Momentum (kg m/s) = mass (kg) X velocity (m/s)

Question 2

What type of quantity is momentum?

Answer 2

• Vector quantity
• Has both magnitude and direction

Question 3

What is the conservation of momentum principle?

Answer 3

• In a closed system, the total momentum before an event is equal to the total momentum after the event

Question 4

Equation for force (momentum)

Answer 4

• Force (N) = change in momentum (kg m/s) / time (s)

Question 5

What can we do to reduce force (momentum)

Answer 5

• As force is momentum / time, if we increase the time then the force will be reduced

Question 6

Methods of increasing contact time in a car

Answer 6

• Crumple zones
• Air bags
• Seat belts