A 70 kg meteor smashes into the earth, hitting with 100,000 N of force. If the object was originally traveling at 20,000 m/s, how long will it take it to come to a rest?

t = 14 s

Explanation:

First, we need to find the acceleration of the meteor by using Newton's s Second Law, as follows:

where,

F = Unbalanced Force = 100000 N

m = mass of meteor = 70 kg

a = acceleration of meteor = ?

Therefore,

a = -1428.57 m/s² (negative sign de to deceleration)

Now, we use general formula of acceleration to find time:

where,

t = time taken = ?

Δv = change in speed = 0m/s - 20000 m/s = - 20000 m/s

Therefore,

t = 14 s

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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.