Author Question: A simple pendulum, 2.0 m in length, is released with a push when the support string is at an angle ... (Read 108 times)

arivle123 · **on:** Jul 28, 2018

A simple pendulum, 2.0 m in length, is released with a push when the support string is at an angle of 25 from the vertical. If the initial speed of the suspended mass is 2.0 m/s when at the release point, what is its speed at the bottom of the swing? (g = 9.8 m/s2)
a. 2.3 m/s
c. 2.8 m/s
b. 2.6 m/s
d. 0.5 m/s

Question 2

A cylinder containing an ideal gas has a volume of 3.0 m3 and a pressure of 1.0 105 Pa at a temperature of 300 K. The cylinder is placed against a metal block that is maintained at 900 K, and the gas expands as the pressure remains constant until the temperature of the gas reaches 900 K. The change in internal energy of the gas is +6.0 105 J. How much heat did the gas absorb?
a. 0
c. 12 105 J
b. 6.0 105 J
d. 9.0 105 J