What is the unit for measuring energy

Awheel rotates without friction about a stationary horizontal axis at the center of the wheel. a constant tangential force equal to 82.0 n is applied to the rim of the wheel. the wheel has radius 0.150 m . starting from rest, the wheel has an angular speed of 12.8 rev/s after 3.88 s. what is the moment of inertia of the wheel?

Will a heavier bowling ball hit pins better than a lighter bsll

Aplane travels 1000 miles in 5 hours .what is the planes average speed?