What are the units for energy? Joule kg m^2s^-2 All three units described here a

Question

What are the units for energy? Joule kg m^2s^-2 All three units described here are valid for Energy Nm None of these three units works Let's say you measure an average acceleration to be 0.3978 ms^- 2 What is the height (in centimeters) of the riser block? Assume the legs of the track span 1.0000 m and that there is neither friction nor drag. Also assume the block is under one of the legs 4/06 Use Use three significant figures or N/A if not enough information is given What is the equation used to teach Data Studio the potential energy? Use variables and type exactly like you should have in Data Studio. U= mass [kg) gravity [9.8 ms

Explanation / Answer

8)The work done by the frictional force is equal to the change/loss in kinetic energy of the cart.

Wf = KE2 - KE1

Wf = 1/2 m v2^2 - 1/2 m v1^2

Wf = 1/2 m (v2^2 - v1^2) = 1/2 x 0.71 (0.36^2 - 0.48^2)

Wf = -0.035784 J = - 35.784 x 10^-3 J = -35.784 mJ

Hence, Wf = -35.784 mJ

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