A child on a sled starts from rest at the top of a 15.0° slope.If the trip to the bottom takes 15.2 s,how long is the slope? Assume that frictional forces may be neglected.
A)293 m
B)586 m
C)1130 m
D)147 m

Question

Quizplus · Accepted Answer

Explanation:The acceleration of the sled is:$$a=gsin	heta=(9.8m/s^2)sin15.0°=2.58m/s^2$$The distance traveled by the sled is:$$d=\frac{1}{2}at^2=\frac{1}{2}(2.58m/s^2)(15.2s)^2=293m$$

A Child on a Sled Starts from Rest at the Top