Mechanics: Speed and Acceleration

A measure of how far an object has travelled

• speed

• distance

• time

• velocity

A measure of how long an object has been travelling for, measured in s

• time

• speed

• distance

• acceleration

The rate of change of speed per time

• velocity

• speed

• time

• acceleration

Negative acceleration

• speeding up

• constant speed

• deceleration

• at rest / stopped

In a distance-time graph, the gradient of a sloping straight line shows

• object has stopped

• object is at constant speed

• object is accelerating

• object is returning to start position

In a distance-time graph, a horiziontal straight line shows

• object has stopped

• object is at constant speed

• object is accelerating

• object is returning to start position

In a distance-time graph, a curved line that is getting steeper and steeper shows

• object is decelerating

• object is at constant speed

• object is accelerating

• object is returning to start position

Which of the following is TRUE

• 60 seconds in an hour

• 100 seconds in a minute

• 60 x 60 seconds in an hour

• 300 seconds in half an hour

v = Δd / Δt is used to calculate speed

Δt =

• Δd ÷ v

• Δd × v

• v ÷ Δd

• none of these

v = Δd / Δt is used to calculate speed

Δd =

• Δt ÷ v

• Δt × v

• v ÷ Δt

• none of these