It takes 86 joules of energy to raise a box 2 meters using the pulley setup shown above. Without the pulley, the box can be raised 2 meters using only 82 joules of energy. What could explain this 4-joule difference?

What is the dimension of ment of inertia?

Geneva says that the only thing that is needed for people to hear the sounds around us is a vibrating object

An astronaut lands on a new planet. The new planet's mass is half that of the Earth and the new planet's radius is half that of the Earth. If he weighs 500 N on Earth, what will the force of gravity be on him on the new planet?

What does decelerate mean

A large body of air hats has similar properties of a temperature and moisture is a

An arrow is shot upward on mars from ground level with a velocity of 60 meters per second. Its height (in meters) after t seconds is given by 2 s (t) = 60t - 1.9t^2.

Energy transformations in a bouncy house

Suppose gene A on the left chromosome is damaged and no longer functions. what form of the trait would show? Why?

What is the use of scientific knowledge and research for an action

How do evaporation and condensation relate to heat