# Power Transmission Need Help

## Homework Statement

A belt drive transmits 56kW from the driver pulley to the driven pulley. If 2.5kW is lost in belt friction, calculate:

1. kW's supplied by driver pulley

2. efficiency of the belt drive expressed as a percentage.

## Homework Equations

%Efficiency = (power output/power input) x 100%

## The Attempt at a Solution

I'm really not sure how to tackle this question, if anyone can help it would be greatly appreciated.

Thanks

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L2E
power in = 56kW
Power loss = 2.5kW
power out = power in - power loss

for efficiency you can just use your equation.

Try it right now!

berkeman
Mentor

## Homework Statement

A belt drive transmits 56kW from the driver pulley to the driven pulley. If 2.5kW is lost in belt friction, calculate:

1. kW's supplied by driver pulley

2. efficiency of the belt drive expressed as a percentage.

## Homework Equations

%Efficiency = (power output/power input) x 100%

## The Attempt at a Solution

I'm really not sure how to tackle this question, if anyone can help it would be greatly appreciated.

Thanks
copying...

L2E
Reading was definitely not my strong point last night. Just want to change what I wrote.

if 56kW was supplied to the driven pulley, 56kW is the output.
the input is unknown (well it's 58.5kW)