Search our library of Physics questions

Top answers

Physics

All levels

What is constant acceleration?

The definition of acceleration is the rate of which an object's velocity changes.

Acceleration = Change in Velocity ÷ Time

Therefore, constant acceleration ...

Answered by Emily O. • Physics tutor

7350 Views

A car accelerates in 12s from 10m/s to 50m/s. Calculate its acceleration.

Firstly, write down the information you know.

S (displacement) - unknown

U (inital speed) - 10m/s

V (final speed) - 50m/s

A (acceleration) - we...

Answered by Yasmin A. • Physics tutor

3530 Views

A hair dryer uses 2000J in 5 seconds when on full power. The power used is?

we are told that E = 2000J and t = 5s we need to find P

recall which formula used energy, time and power

P = E/t

sub in values

P = 2000/5

Answered by Tom F. • Physics tutor

2427 Views

Describe how a capacitor works.

If you think of electrons as tennis balls being passed around by a circle of people, then a capacitor occurs when there is a gap between 2 people which is too large for the ball/electron to be passed o...

Answered by Charlotte W. • Physics tutor

3733 Views

When does a pendulum bob move fastest and why?

A pendulum bob will move fastest when the mass is at its lowest point (when x=0). The reason for this is that in the pendulum system energy is transferred between kinetic and gravitational potential en...

Answered by James B. • Physics tutor

24302 Views