P4: More About Forces

Question 1

Stopping Distance =

Answer 1

Thinking Distance + Braking Distance

Question 2

Thinking Distance

Answer 2

Driver’s Reaction Time

Question 3

Braking Distance

Answer 3

Braking Force Action Time

Question 4

Weight

Answer 4

The force of gravity on an object (N)

Question 5

Mass

Answer 5

The quantity of mass of an object (kg)

Question 6

Gravitational Field Strength

Answer 6

The force of gravity on an object mass of 1kg
(N/kg)
The acceleration of free fall

Question 7

Earth’s Gravitational Field Strength

Answer 7

10 N/kg

Question 8

Weight =

Answer 8

Mass x Gravitational Field Strength

Question 9

Gravitational Field Strength

Answer 9

Weight/ Mass

Question 10

If an object falls with only gravity acting on it..

Answer 10

… Its resultant force is its weight.

Question 11

If an object falls in a fluid…

Answer 11

… the resultant force is its weight - the frictional force on it.

Question 12

What speed does an object acted on only by gravity accelerate at?

Answer 12

10m/s(2)

Question 13

Terminal Velocity

Answer 13

The velocity reached by an object when the drag force is equal and opposite to the force making it move.