An object with a mass of 5.5 kg is allowed to slide from rest down an inclined plane.The plane makes an angle of 30º with the horizontal and is 72 m long.The coefficient of friction between the plane and the object is 0.35.The speed of the object at the bottom of the plane is
A)5.3 m/s
B)15 m/s
C)24 m/s
D)17 m/s
E)11 m/s

Question

Quizplus · Accepted Answer

The speed can be found using energy conservation. The gravitational potential energy lost is converted into kinetic energy and work done against friction. Calculate the gravitational force component along the plane, subtract the frictional force, and use the work-energy principle to find the final speed.

An Object with a Mass of 5