At the gym, a man pulls a bar on a machine that works the muscles of the upper back. It takes him 0. 5 seconds to raise 30 kilograms of weights a vertical distance of 0. 5 meters.

Which of these exerts the same power output? (Estimate g as 10 m/s2. )

A) lifting 25 kilograms a distance of 2. 4 meters in 2. 0 seconds

B) lifting 45 kilograms a distance of 2. 4 meters in 3. 0 seconds

C) leg pressing 45 kilograms a distance of 0. 5 meters in 0. 5 seconds.

D) bench pressing 30 ligrograms a distance of 0. 5 meter in 1. 5 seconds.

Pleas help me

Will give brainliest! which statement best describes the difference between strong nuclear forces and weak nuclear forces? weak nuclear forces are involved when certain types of atoms break down. strong nuclear forces are responsible for holding atoms' nucleus together. weak nuclear forces hold bonds between atoms together. strong nuclear forces hold together the nucleus of an atom. strong nuclear bonds prevent atoms from falling apart. weak nuclear bonds prevent compounds from falling apart. strong nuclear forces are involved in breaking electrons from their shells. weak nuclear forces hold protons in the nucleus.

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen

The slope of a velocity time graph over any interval of time gives the during that interval