Forces

Question 1

Vector

Answer 1

Has size and direction

Force velocity acceleration momentum

Question 2

Scalar

Answer 2

Only have size

Mass temp time length

Question 3

Stopping distance

Answer 3

= thinking distance + breaking distance

Question 4

Things that affect you thinking distance

Answer 4

Speed and reaction time. Reaction time can be affected by your tiredness alcohol or drug use; age or inexperience.

Question 5

Things that affect your stopping distance

Answer 5

Speed, mass or vehicle, quality of brakes, quality of grip(tyres, road surface, weather conditions)

Question 6

Momentum equation

Answer 6

Momentum = mass x velocity

Question 7

Acceleration

Answer 7

Acceleration= change in velocity/time

Question 8

Average speed equation

Answer 8

Average speed = distance/time

Question 9

Momentum info

Answer 9

Momentum is conserved if no external forces act so it’s the same before and after

Question 10

Force causes change in momentum equation

Answer 10

Force = change in momentum/ time

Question 11

Moment is a turning effect of a force

Answer 11

Moment = force x perpendicular distance between line of action and pivot

Question 12

Moment if object is balanced

Answer 12

Total anti-clockwise moments= total clockwise movements