Suppose you are holding a basketball while standing still on a skateboard. you and the skateboard have a mass of 50kg. you throw the basketball with a force of 10n. what is your acceleration before and after you throw the ball?

not too sure thinking it will always be directed towards the centre of the earth. could be wrong not sure

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.