A certain pendulum consists of a 1.5-kg mass swinging at the end of a string (length = 2.0 m). At the lowest point in the swing the tension in the string is equal to 20 N. To what maximum height above this lowest point will the mass rise during its oscillation?
a. 77 cm
b. 50 cm
c. 63 cm
d. 36 cm
e. 95 cm
d
You might also like to view...
If you started with $100 in the bank and you had $200 after letting it sit there for 5 years, what would be the annual interest rate you received?
a. 2% b. 5% c. 10% d. 14% e. 22%
A 5.00 kg object has a moment of inertia of 1.20 kg 
What torque is needed to give the object an angular acceleration of 2.0 
A. 2.4 N•m B. 2.6 N•m C. 2.8 N•m D. 3.0 N•m E. 3.2 N•m
Which of the following best describes what we mean by a worm hole?
A) a hypothesized but unproven type of "tunnel" through hyperspace that connects distant points in the real universe B) a proven way of traveling through space faster than the speed of light C) a possible method of traveling through space faster than the speed of light D) a discarded idea about time travel that physicists now know to be impossible
Suppose an unpowered but moving railroad car receives some coal (basically at rest) from a stationary conveyor belt. This coal therefore only carries chemical energy into the car. This mass transfer will
A. Cause the car’s speed to increase. B. Cause the car’s speed to decrease. C. Have no effect on the car’s speed.