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Physics
GCSE

Two balls of identical size and shape are dropped from the same height. One ball has a mass of 50kg and the other has a mass of only 10kg. Why do they reach the ground at the same time?

The only forces acting on the balls are gravity (pulling down) and air resistance (pushing up). Since the balls are the same shape and size, the air resistance will be the same on both. Likewise, the grav...

Answered by Gregor P. Physics tutor
14241 Views

How are force and work related?

The work done on a body is defined as the force applied to that body multiplied by the distance it is applied over.

Answered by Alex A. Physics tutor
2213 Views

Explain the process of nuclear fission.

I would start by defining nuclear fission: 'Nuclear fission is the process of splitting up atoms and harnessing the energy from the reaction.' I would then proceed to explain how this occurs: 'Fission hap...

Answered by Rob S. Physics tutor
9136 Views

How can an object be at rest without friction?

Friction is a force, and no object can change speed (accelerate/decelerate) without first being acted on by a force. On a frictionless surface (with no other external forces present), there is therefore n...

Answered by Tom B. Physics tutor
14676 Views

What is the unit frequency is measured in?

Hertz (Hz), or sometimes megahertz if the Hz is very large.

Answered by Bradley P. Physics tutor
3449 Views

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