(adsbygoogle = window.adsbygoogle || []).push({}); physics hw help ASAP thx!!!!

thx so much, here they are:

48. A block of mass 0.6 kg slides 6.0 m down a frictionless ramp inclined at 20 degrees to the horizontal. It then travels on a rough horizontal surface where coefficient of kinetic friction is 0.50.

a) what is its speed after traveling 1.00 m on the rough surface?

b) what distance does it travel on this horizontal furface before stopping?

68. An electron moves with a speed of 0.995c.

a) what is its kinetic energy?

b) if you use the classical expression to calculate its kinetic energy, what percentage error would result?

k = mc^2((1/(1-(v/c)^2))-1)

thx a lot

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# What is its speed after traveling 1.00 m on the rough surface?

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