Mechanics

Question 0

What do forces do to elastic objects?

Answer 0

Stretch or compress them

Question 1

What is speed and velocity measured in?

Answer 1

m/s

Question 2

What is the momentum of an object?

Answer 2

Mass x Velocity = Momentum

(kg) (m/s) (kg m/s)

Question 3

What effects the thinking distance?

Answer 3

Reaction Time
Alcohol/Drugs
Tiredness 
Illness
Speed of Vehicle

Question 4

What effects breaking distance?

Answer 4

Road surface (icy/gravel)
Speed of Vehicle
Mass of Vehicle
Condition of Breaks

Question 5

What is the total momentum before always?

Answer 5

Zero

Question 6

In an explosion will the object be moving at the beginning?

Answer 6

No

Question 7

What does the total momentum before the collision or explosion always equal?

Answer 7

The total momentum after the collision or explosion

Question 8

What is breaking distance?

Answer 8

Distance travelled while breaking

Question 9

What is thinking distance?

Answer 9

The distance travelled in the time it takes from seeing the hazard to applying the breaks

Question 10

What is impulse?

Answer 10

Force x Time

Question 11

What do seat belts do to reduce the impact?

Answer 11

They lengthen in order to reduce the force acting on you to a safe level