Ateam of dogs drags a 53.9 kg sled 1.62 km over a horizontal surface at a constant speed. the coefficient of friction between the sled and the snow is 0.234. the acceleration of gravity is 9.8 m/s 2 . find the work done by the dogs. answer in units of kj.

200.24 kJ

Explanation:

= mass of sled = 53.9 kg

= distance traveled by the sled = 1.62 km = 1620 m

= Coefficient of friction between sled and snow = 0.234

frictional force acting on the sled is given as

= Applied force by the dogs on the sled

Since the sled moves at constant speed, the force equation for the motion of the sled is given as

= Work done by the dogs on the sled

Work done by the dogs on the sled is given as

what question you dont ask a question

explanation:

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form