Question

A body weighing 250 kilogram is moved through 225 metre in 75 seconds . Find the power required​

Answer 1

Answer:

We can use the following formulae:

Work = force times distance

Power = work per second

Force = mass times acceleration

Velocity = acceleration times time

We are given:

Mass =1500kg

Acceleration =5m/s2

Time =5s

So we calculate:

Force =1,500×5=7,500N

Final Velocity =5×5=25m/s

Final Power =7,500×25=187,500W

The minimum engine power required is:

187.5kW

For the traditionalists that's just over 251 horsepower accelerating 0-60mph in just over 5 seconds. (Only making it to about 56mph in five seconds.)

Answer 2

We can use the following formulas:-

Work = force times distance

Power = work per second

Force = mass times acceleration

Velocity = acceleration times time

We are given:

Mass =1500kg=1500kg

Acceleration =5m/s2=5m/s2

Time =5s