# Measuring acceleration practical (v=s/t, a = Δv/t)

I can accurately measure the acceleration of a dynamics trolley.

# Measuring acceleration practical (v=s/t, a = Δv/t)

I can accurately measure the acceleration of a dynamics trolley.

## Slide deck

## Lesson details

### Key learning points

- A dynamics trolley has a constant acceleration down a steep ramp.
- Acceleration = change of velocity ÷ time and change in velocity = final velocity – initial velocity
- Light gates can improve accuracy of measurement of instantaneous velocity and reduces random errors.
- Using video recording allows for accurate measurement of small time intervals.

### Common misconception

Pupils often think that final velocity is proportional to acceleration and do not take into account the time over which an object is accelerating.

Compare how many times greater the calculated accelerations of two sets of readings are compared to how many times greater the final velocities are.

### Keywords

Acceleration - The acceleration of an object is the change in velocity per second.

Velocity - The velocity of an object is the change in displacement per second.

Dynamics trolley - A dynamics trolley is a wheeled object used in experiments. It moves very smoothly over flat surfaces.

### Content guidance

- Equipment requiring safe usage.

### Supervision

Adult supervision recommended.

### Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

## Video

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## Worksheet

## Starter quiz

### 6 Questions

## Exit quiz

### 6 Questions

velocity -

the speed of an object in a particular direction

rate -

the amount of change every second

acceleration -

the rate of change of velocity

deceleration -

the decrease in velocity every second

delta v (𝚫$$v$$) -

the symbol used to represent change in velocity

velocity -

a vector measured in m/s

distance -

a scalar measured in m

acceleration -

a vector measured in m/s$$^2$$

speed -

a scalar measured in m/s

displacement -

a vector measured in m