Momentum (11)

Question 1

Momentum equation

Answer 1

Mass x velocity

Question 2

Unit of momentum

Answer 2

Kg m/s

Question 3

P = ___ x ___

Answer 3

P = m x v

Question 4

Law of conservation of momentum: So long as no external __________ are acting on the objects involved, the total ____________ stays the same in explosions and collisions

Answer 4

Forces

Momentum

Question 5

The __________ the mass of an object and the ____________ its velocity the more momentum the object has

Answer 5

Greater

Greater

Question 6

Momentum is a __________ quantity (it has size and direction)

Answer 6

Vector

Question 7

Momentum is conserved when no external ___________ act

Answer 7

Forces

Question 8

The total momentum __________ is the same as it was __________

Answer 8

After

Before

Question 9

When a __________ acts on an object, it causes a change in momentum

Answer 9

Force

Question 10

A larger force means a _________ change of momentum (therefore a greater acceleration)

Answer 10

Faster

Question 11

If someone’s momentum changes very quickly, the forces acting on them will be very __________, and more likely to cause injury

Answer 11

Large

Question 12

What is the aim when designing cars for when they crash

Answer 12

They are designed to slow people down over a longer time when they have a crash

Question 13

The longer it takes for a change in momentum, the ___________ the force

Answer 13

Smaller

Question 14

Name 3 things that slow people down over a longer time when they have a crash

Answer 14

Crumple zones
Seat belts
Air bags