Question

It took an American football lineman 14 seconds to complete 10 repetitions of a 102 kg bench press. If the bar had to travel 1.47 meters each repetition, what was the average power output during this set?

Answer 1

Answer:

1050.651 W

Explanation:

m = Mass of bench press = 102 kg

h = Height of lift = 1.47 m

t = Time taken = 14 seconds

g = Acceleration due to gravity = 9.81 m/s²

The work done is

$W=mgh\\\Rightarrow W=102\times 9.81\times 1.47\\\Rightarrow W=1470.9114\ J$

For 10 times

$W=10\times 1470.9114\\\Rightarrow W=14709.114\ J$

Power is given by

$P=\dfrac{W}{t}\\\Rightarrow P=\dfrac{14709.114}{14}\\\Rightarrow P=1050.651\ W$

The power is 1050.651 W