1. What is the centripetal force maintained by a 10 kg piece of metal that revolves in a 4m radius circle at 8m/s?
a=
Fo=
Given:
m=.
Formula:
Solution:
Fc=mv2/
at is the computed centripetal force of the piece of metal?

How have the competing explanations' experiments on atoms affected the development of the atomic model?

Astone is dropped from a cliff and falls 9.44 meters. what is the speed of the stone when it reaches the ground? a. 13.6 m/sec b. 1.39 m/sec c. 185 m/sec d. 9.80 m/sec

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.