Mechanics Review 2023

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

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

a = Δv / Δt is used to calculate acceleration

Δ means

• small triangle

• small amount

• change in

• initial

a = Δv / Δt is used to calculate acceleration

if an object speeds up from 0 ms^-1 to 20 ms^-1 in 5 s, then its acceleration is

• 0.4 ms^-1

• 4 ms^-2

• 4 ms^-1

• 0.4 ms^-2

In a speed - time graph, a horizontal line means

• constant speed

• constant acceleration

• object has stopped

• object is falling vertically

In a speed - time graph, the area under a line is

• just the area under the line :)

• the distance travelled by an object

• the speed the object is travelling

• the acceleration of the object

How do you calculate the gradient of a straight line?

• rise x run

• rise / run

• run / rise

• rise + run