Solution Found!
Answer: On a horizontal surface, a crate with mass 50.0 kg
Chapter 7, Problem 44P(choose chapter or problem)
Problem 44P
On a horizontal surface, a crate with mass 50.0 kg is placed against a spring that stores 360 J of energy. The spring is released, and the crate slides 5.60 m before coming to rest. What is the speed of the crate when it is 2.00 m from its initial position?
Questions & Answers
QUESTION:
Problem 44P
On a horizontal surface, a crate with mass 50.0 kg is placed against a spring that stores 360 J of energy. The spring is released, and the crate slides 5.60 m before coming to rest. What is the speed of the crate when it is 2.00 m from its initial position?
ANSWER:
Solution 44P
Step 1:
Maximum energy of the crate will be, PE = 360 J when it is compressed.
Therefore, the maximum energy is nothing but the work done on the spring. So we can write,
W = 360 J
We know that, W = FS
The distance it moved, S = 5.60 m
Then F = W/S = 360 J/5.60 J = 64.28 N