Chapter 2 (kinematics)

Question 1

Formula for average speed

Answer 1

total distance travelled / total time taken

Question 2

What is velocity

Formula of velocity

Answer 2

Velocity is the rate of change in displacement

displacement / time taken

Question 3

What is acceleration

Formula of acceleration

Answer 3

Acceleration is the rate of change of velocity

change in velocity / time taken

Question 4

What is uniform acceleration

Formula of uniform acceleration

Answer 4

Uniform acceleration is a constant rate of change of velocity

(final velocity - initial velocity) / time taken

Question 5

What can be found in a speed-time graph

(talk about the gradient and distance travelled)

Answer 5

area under the graph is the distance travelled

the gradient
- increasing gradient = speed increasing at a constant pace
- horizontal gradient = speed is at a constant pace
- decreasing gradient = speed decreasing at a constant pace

Question 6

What can be found in a distance-time graph

(talk about the gradient)

Answer 6

the gradient = the speed of the object
- gradient in a U-shape = object is accelerating / increasing speed
- gradient in a straight line = (diagonally) object is moving a constant speed
(horizontally) object is not moving / is stationery
- gradient in an N-shape = object is decelerating / decreasing speed