I use a rope 1.00-m-long to swing a 1.00-kg weight around my head. The tension in the rope is 20.0 N. In half a revolution how much work is done by the rope on the weight?
a. 20.0 J
b. 31.4 J
c. 123 J
d. 0
D
You might also like to view...
An electron moving perpendicular to a magnetic field of 3.2 × 10-2 T moves in a circle of radius 0.40 cm. How fast is this electron moving?
A) 2.3 × 107 m/s B) 1.9 × 10-53 m/s C) 1.9 × 10-30 m/s D) 3.0 × 109 m/s E) 0.80 × 107 m/s
Temperature is a relative measure of
a. latent heat. b. hotness and coldness. c. internal energy. d. specific heat.
A parallel plate capacitor with circular plates having radius 0.07 m and a dielectric with constant 2.2. If it is desired to store 
J in this capacitor, what must the separation distance be for a voltage of 1.5 kV?
A. 2.8 cm B. 5.5 cm C. 1.3 cm D. 0.90 cm E. 1.4 cm
Collisions between low density continental plates create the tallest mountain chains, such as the Himalayas
Indicate whether the statement is true or false