The two masses in the figure are released from rest.After the 3.0-kg mass has fallen 1.5 m,it is moving with a speed of 3.8 m/s.What is the change in mechanical energy done on the system during this time interval by the frictional force on the 2.0 kg mass? 
Definitions:
Return on Investment
A measure used to evaluate the efficiency of an investment or compare the efficiency of several investments, calculated as the return divided by the cost of the investment.
Dividends
Distributions from a company to its shareholders, symbolizing a share of the company's earnings.
Constant
In mathematics or physics, a constant is a fixed value that does not change. In programming, it refers to an immutable value.
Supernormal Rate
Typically refers to an above-average rate of return on investment or growth.
Q8: A force <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2295/.jpg" alt="A force
Q15: Particles (mass of each = 0.20 kg)are
Q17: Sebastian has drawn a free-body diagram for
Q18: If <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2295/.jpg" alt="If =
Q26: A particle moving along the x axis
Q42: Knowing that <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2295/.jpg" alt="Knowing that
Q49: A 6.0-kg object moving 2.0 m/s in
Q57: A 3.0-kg mass sliding on a frictionless
Q61: If <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2295/.jpg" alt="If ,
Q91: At an instant when a 4.0-kg object