oil,and grease lubricants also work
The punching bag applies the same amount of force to the boxer’s hand. (C)
I don't know, you didn't put which answers that could possibly describe it, but it is in light years/light speed...
Answer:
No
Explanation:
According to physics, the work done by porter is zero but in reality porter gets tired as muscular energy is being used up.
In physics, work is the dot product of force and displacement. when the porter moves with the luggage, the weight act downwards while the porter moves forward. The angle between force and displacement is 90°. Thus, work done by the porter is zero.
The muscles are doing work in this case which is not calculated in physics.
Power is the rate of energy consumed during the work.
The displacement of the bus is 6.25 miles.
