P9 Motion

Question 1

Acceleration

Answer 1

change of velocity per second (in metres per second per second, m/s2)

Question 2

Deceleration

Answer 2

change of velocity per second when an object slows down

Question 3

Displacement

Answer 3

distance in a given direction

Question 4

Gradient (of a straight line)

Answer 4

change of the quantity plotted on the y-axis divided by the change of the quantity plotted on the x-axis

Question 5

Tangent

Answer 5

a straight line drawn to touch a point on a curve so it has the same gradient as the curve at that point

Question 6

Velocity

Answer 6

speed in a given direction (in metres/second, m/s)

Question 7

How to work out speed

Answer 7

Speed=distance divided by time and has units of metres per second

Question 8

Acceleration

Answer 8

A body will accelerate if its speed increases over time

Question 9

Distance

Answer 9

Distance=speed x time

Question 10

Units

Answer 10

Acceleration (m/s)2
Final velocity (m/s)
Initial velocity (m/s)
Time taken for change in speed