A weight lifter cleans and jerks 150kg, lifting it 2m above the ground in 1.5s. What is his power output?
power= work/time= mgh/2
yeah that didn't help but thanks
4.0
To calculate the power output of the weightlifter, we need to use the formula:
Power = Work / Time
First, let's calculate the work done by the weightlifter.
Work is given by the formula:
Work = Force × Distance
In this case, the force is equal to the weight of the object being lifted, which is given as 150kg. The distance lifted is 2m.
Work = 150kg × 2m
Work = 300kg·m
Next, we need to calculate the time taken to perform the lift, which is given as 1.5s.
Now, we can substitute these values into the power formula:
Power = Work / Time
Power = 300kg·m / 1.5s
To simplify, we need to convert the units of kg·m to joules (J). We know that 1 kg·m is equal to 9.8 J.
Power = (300kg·m × 9.8 J) / 1.5s
Power = 2940 J / 1.5s
Power = 1960 Watts (W)
Therefore, the power output of the weightlifter is 1960 Watts (W).