A 20-Kg Block Is Projected Down a Plane That Makes an an Angle

question 9

Multiple Choice

A 2.0-kg block is projected down a plane that makes an angle of 20° with the horizontal with an initial kinetic energy of 2.0 J. If the coefficient of kinetic friction between the block and plane is 0.40, how far will the block slide down the plane before coming to rest?

• A) 3.0 m
• B) 1.8 m
• C) 0.30 m
• D) 1.0 m
• E) 1.3 m

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Definitions:

Potential Energy

The energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.

Chemical Energy

A form of potential energy stored in chemical bonds between atoms and molecules.

Mechanical Energy

The sum of potential energy and kinetic energy in a system, related to the position and movement of objects.

Thermal Energy

The internal energy of a system due to its temperature, related to the motion of its particles.