Forces And Motion

Question 1

Distance-time graphs: gradient meanings

Answer 1

Gradient going up means constant speed.
Gradient flat means stationary.

Question 2

Velocity time graphs gradient going up

Answer 2

Accelerating

Question 3

Velocity time graphs gradient is flat

Answer 3

Constant speed

Question 4

Velocity time graph the gradient is negative

Answer 4

Deceleration

Question 5

Area under the gradient

Answer 5

Distance travelled

Question 6

Explaining distance time graphs

Answer 6

Explain in sections when there is a change in speed

Question 7

What can forces do

Answer 7

Forces can cause an object to change speed, shape or direction

Question 8

Scalar quantities

Answer 8

Scalar quantities are quantities with magnitude only

Question 9

Vector quantities

Answer 9

Vector quantities are quantities with a magnitude and a direction

Question 10

Examples of scalar quantities

Answer 10

Mass
Distance

Question 11

Examples of vector quantities

Answer 11

Velocity
Acceleration

Question 12

How to calculate the resultant force

Answer 12

Adding the sizes of forces and seeing which is the strongest in which direction

Question 13

Stopping distance

Answer 13

Stopping distance is the sum of the thinking distance and braking distance

Question 14

Factors that effect stopping distance

Answer 14

Speed. How fast the vehicle is moving
Mass. How heavy the vehicle is
Road Condition. Is the road icy or wet?
Reaction Time. How fast the reaction time of the driver is

Question 15

What is constant velocity

Answer 15

When gravity and air resistance balance

Question 16

Elastic behaviour

Answer 16

Elastic behaviour is the ability of a material to recover its original shape after forces have been removed