Author Question: Find the how much mechanical energy was converted to internal energy in the system box-surface-Earth ... (Read 71 times)

anjilletteb · **on:** Jul 29, 2018

Find the how much mechanical energy was converted to internal energy in the system box-surface-Earth when a box moves in a complete circle of radius on a uniform horizontal floor.

The coefficient of kinetic friction between the floor and the box is 0.25, and the box weighs A) 190 J
B) 0 J
C) 1800 J
D) 370 J

Question 2

A 60.0-kg man stands at one end of a 20.0-kg uniform 10.0-m long board. How far from the man is the center of mass of the man-board system?

A) 1.25 m
B) 2.50 m
C) 5.00 m
D) 7.50 m
E) 9.00 m