Changing the subject!
An important skill in physics is to rearrange formulas. Click the picture to watch the lesson movie.
An important skill in physics is to rearrange formulas. Click the picture to watch the lesson movie.
A quick video to calculate the acceleration down a slope.
For Higher Physics students:
It is impossible to measure the speed of an object at an instant.
It is only possible to find the object’s speed over a small distance and time.
This is achieved using a light gate and a thin card of length say 10 cm.
When the card interrupts the light beam it turns off a light sensor and starts an electronic timer.
The timer stops when the card passes the light beam and the sensor picks up the light signal again.
The near instantaneous speed is calculated by:
Click the above picture for information on how astronomers detect exoplanets.
Exoplanets are planets orbiting a star outside our solar system.
Click the picture to work out the speed of sound in water and glass.
How do the speeds compare to the speed of sound in air?