14. (a) volt (b) ohm
Match each term on the left with the most
appropriate description on the right.
(i) the unit of electric
resistance
(ii) device that measures
several electrical
quantities including
voltage, current, and
resistance
(c) multimeter (iii) an electric current
in which the flow of
charged particles
travels in one direction
only
(d) direct (iv) the unit of electric
current
potential (13.1, 13.4) Ky

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?

Since the energy was not raising the temperature of the water during these segments, what was the energy used to do instead? your answer must include an explanation of what is happening to the molecules.

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.