Question

(Assume zero air resistance & no friction) PLEASE SHOW ALL WORK

Note: All the questions pertain to the same problem

A box is lifted by a first class lever. The resistance arm of the lever is 2.000m long. The effort arm of the lever is 10.00m. An effort force of 100.0N must be pushed off the shelf. It takes 3.485s for the box to hit the floor.

a) What is the mass of the box?

b) What is the mechanical advantage of the lever?

c) How high is the shelf?

d) What is the potential energy of the box when it is sitting on the shelf?

e) What is the velocity of the box when it hits the floor?

f) What is the potential energy of the box after it has fallen for 1.50s?

g) What is the kinetic energy of the box after it has fallen for 2.25s?

h) What is the kinetic energy of the box after it has fallen for 3.30s?

i) What is the potential energy of the box after it has fallen for 3.30s?

J) What is the kinetic energy of the box the instant that it hits the floor?

Answer 1