# Measuring instantaneous speed practical (v=s/t)

I can accurately measure the instantaneous speed of a dynamics trolley.

# Measuring instantaneous speed practical (v=s/t)

I can accurately measure the instantaneous speed of a dynamics trolley.

## Slide deck

## Lesson details

### Key learning points

- A dynamics trolley speeds up (accelerates) along the whole length of a steep ramp.
- Instantaneous speed is the average speed over a very short time period.
- Instantaneous speed can be estimated by measuring movement in a small time period.
- Anomalous readings should be repeated and replaced or removed from sets of repeat readings.

### Common misconception

When the trolley is released it speeds up quickly at the start and then rolls at a constant speed.

Show a video of an accelerating trolley in slow motion identifying the distance travelled in successive equal intervals of time.

### Keywords

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

Average speed - The average speed is the total distance travelled divided by the total time for a journey.

Instantaneous speed - The instantaneous speed of an object is the speed at a particular moment in time.

Anomalous reading - An anomalous reading is a result which is significantly outside the pattern in a set of results.

### 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

Loading...

## Worksheet

## Starter quiz

### 6 Questions

## Exit quiz

### 6 Questions

the total distance travelled divided by the time taken

the speed of an object at a particular moment

a wheeled object used in motion experiments

a result which does not fit the pattern of a set of results