Measuring acceleration practical (v=x/t, a=(v-u)/t) | Exit Quiz | Oak National Academy

Match the following key words or phrases to their definitions.

• velocity

• the amount of change every second

• the speed of an object in a particular direction

• rate

• the decrease in velocity every second

• acceleration

• the rate of change of velocity

• deceleration

• the symbols used to represent change in velocity

Match the following quantities to their definitions.

• velocity

• a vector measured in m

• acceleration

• a scalar measured in m

• speed

• a vector measured in m/s

• distance

• displacement

• a scalar measured in m/s

Answer explanation

Displacement, velocity, and acceleration all have direction, so they are vector quantities. Distance and speed do not have direction so are scalar quantities.

• acceleration = change in velocity + time

• acceleration = change in velocity ÷ time

• acceleration = change in velocity × time

A motorcycle reduces its velocity from 25 m/s to 14 m/s in 5.5 s. Which of the following is the deceleration of the motorcycle?

A cricket ball moving at 20 m/s is hit by a bat, and then travels in the opposite direction at 15 m/s. The impact lasts for 0.05 s. Calculate the acceleration. You do not need to enter the unit.