1) A 1.0-kg object moving in a certain direction has a kinetic energy of 2.0 J. It hits a wall and comes(adsbygoogle = window.adsbygoogle || []).push({});

back with half its original speed. What is the kinetic energy of this object at this point?

Attempt at solution: 1/2mv^2 = 1/2m(0.5)v^2

2)

An object of mass 10.0 kg is released from the top of an inclined plane which makes an angle of inclination of 30.0 ° with

the horizontal. The object slides along the inclined plane. The questions refer to the instant when the object has traveled

through a distance of 2.00 m measured along the slope. The coefficient of kinetic friction between the mass and the

surface is 0.200. Use g = 10.0 m/s2.

How much work is done by the force of friction?

Attempt: mgh - mkmgd= 1/2mv^2

I keep getting the wrong answer for this one... is my equation wrong?

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# Homework Help: Help! Kinetic Energy / Inclined Plane

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