W= force • d cos
2.
KE= ½2
Keq = k1 + k2(par) 1/keq = 1/k1 + 1/k₂(series)
F=
Spring Energy Quiz 50 pts
1. A 3.51 kg marble is at a height 15.1 meters. It is shot out of a cannon at 18.4 m/s that applies an extra 900.0 J of
work to the system. How fast of a velocity is it going at 32.1 meters of height?
Each square is 300 J. 12 pts
Initial
Energy
KE PE
+ Work =
W
Final
Energy
KE PE
0
KE; + PE + Wext = KEf + PEf
A 0.845kg lightbulb uses 1755.5 W in 1.2444 seconds. If the bulb is not efficient and all the work turns into
heat, find its specific heat capacity if it went from 12.31°C to 58.93°C. 1000 J = 1 kJ 6 pts
3. A 594 N/m spring and a 783 N/m spring are in series. If the displacement of elongation is 78.5 cm. Find the .
Potential energy and force. 7 pts