Use g = 10 m/s/s. You push a 30 kg stationary box across a rough surface with a sideway force of 80 N in the positive direction over a time of 4 seconds. The coefficient of kinetic friction is 0.20. Let the direction to the right be positive. Required:
a. What is the contribution from the push force to the total impulse?
b. What is the contribution from the friction force to the total impulse?
c. What is the total impulse given to the box?
d. What is the final velocity of the box?

Good Luck!

Explanation:

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.