# Explain how the conservation of energy applies to a pendulum swinging?

### Mary Rodriguez

Passionate about Business, Economics and Careers Guidance

I found the most amazing explanation from BBC Bitesize. Have a look, let me know if you find it useful in the comments: When the pendulum is at the start of its swing it has no kinetic energy because it is not moving, but its gravitational potential energy is at a maximum because it is at the highest point. As it swings downwards it loses height. So its gravitational potential energy decreases. At the bottom of its swing, its kinetic energy is at a maximum and its gravitational potential energy is at a minimum - because it is at its lowest point. As the bob swings upwards it slows down. Its kinetic energy decreases as work is done against its weight. As it gains height the gravitational potential energy increases again. At the very top of its swing, it stops for a moment. It once again has no kinetic energy, but its gravitational potential energy is at a maximum.

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### Asked in Physics π

ASKED BY ABBIE

PHYSICS π#### A cheetah stalking her pray is moving at 1 m/s. She accelerated to a speed of 25 m/s to catch the zebra. Her acceleration is 10 m/s^2. Calculate the time taken to reach her top speed?

use the suvat equation v=u+at 25=1+10t therefore t=2.4 seconds

ASKED BY WILL

PHYSICS π#### How many planets are there?

There are eight planets. Pluto is no longer one of them π

ASKED BY FABIHA

PHYSICS π#### When phosphoric acid is added to water it disassociates to form three H+ ions. Give the equation for its disassociation in water?

In simplest form, H3PO4 -> 3H^+ + PO4^3-

ASKED BY JOSHUA

PHYSICS π#### How do you describe the transfer of energy?

Energy transfers from a place of high energy to one of lower energy. Every single time!

ASKED BY SELINA

PHYSICS π#### How fast is light?

The speed of light is equivalent to 3.0*10^8ms^-1.

ASKED BY SHREYA

PHYSICS π#### What is velocity?

Velocity is the speed of something in a given direction.

ASKED BY SHREYA

PHYSICS π#### What is acceleration?

Acceleration is the rate of change of velocity in a given period of time.

ASKED BY ABBIE

PHYSICS π#### A space shuttle has an acceleration of 29 m/s^2. The initial velocity is 2 m/s. Calculate the velocity of the shuttle after 8 seconds?

use the suvat equation v=u+at v=2+29*8 therefore v=234m/s

ASKED BY ISHA

PHYSICS π#### A block is placed on an inclined plane which is moving towards right horizontal with an acceleration 10. The length of AC is1m if all surfaces are smooth then time taken by block to reach from CtoA?

Do you know initial velocity? If so you can use a suvat equation to help you answer this. S=ut+1/2at^2 S=distance travelled, u=initial velocity, a=v...

ASKED BY DAVID

PHYSICS π#### What is escape velocity?

The velocity (speed in a straight line) needed to escape a planets gravity & atmosphere. For the Earth it's just over 25,000mph....

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