A 19.0 kg child is riding a playground merry-go-round that is rotating at 40.0 rev/min. What centripetal force (in N) must she exert to stay on if she is 2.00 m from its center

The centripetal force is 663.95 N.

Explanation:

Given that,

Mass of the child, m = 19 kg

Angular velocity of the merry-go-round,

Distance from the center, r = 2 m

We need to find the centripetal force acting on the child. The centripetal force is given by the formula as :

F = 663.95 N

So, the centripetal force is 663.95 N. Hence, this is the required solution.

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.

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