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

1050.651 W

Step-by-step 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* 9.81* 1.47\\\Rightarrow W=1470.9114\ J`

For 10 times

`W=10* 1470.9114\\\Rightarrow W=14709.114\ J`

Power is given by

`P=(W)/(t)\\\Rightarrow P=(14709.114)/(14)\\\Rightarrow P=1050.651\ W`

The power is 1050.651 W