Example of Energy Transferred Into and Out of a System (14:52)
Example: A 7.50 kg block on a level surface is acted upon by a force applied of 35.0 N at an angle of 25.0° below +x axis. The block starts at rest, the coefficient of kinetic friction between the block and surface is 0.245, and the block is displaced 6.50 m to the right. Find the:
a) Final velocity of the block.
b) Work done by each force acting on the block.
c) Change in internal energy of the block.
d) Change in kinetic energy of the block.
e) And show that the change in energy of the block equals the energy transferred to the block.
This is an AP Physics C: Mechanics topic.
0:00 The example
1:14 Translating the problem
2:37 Part (a) - Free Body Diagram
4:13 Part (a) - Summing the forces
6:01 Part (a) - The i and j directions
7:24 Part (a) - Uniformly Accelerated Motion
8:14 Part (b)
10:23 Part (c)
11:04 Part (d)
12:39 Part (e)
14:02 The Work-Energy Theorem