A 2-kilo block is released from rest at the top of a curved incline in the shape of a quarter of a cricel of radius R. The block that slides onto a horizontal plane where it finally comes to rest 8 meters from the beginning of the plane. The curved incline is frictionless, but there is 8-newton froce of friction on the block while it slieds horizontally. Assume g = 10 meters per second Required:
a. Determine the magnitude of the acceleration of the block while it slides along the horizontal plane.
b. What time elapses while the block is sliding horizontally?

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i just did this and got a 100.

v 154.9= 0.9 length length s little over 154.9cm

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.