A roller coaster containing three cars is accelerating at 10 m/s2 before it comes to an abrupt stop at the end of the ride. The mass of one car is 300 kg. How much force was exerted on the roller coaster to bring it to a stop?

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

answer: option c.

explanation:

a.   mass number from atomic number

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.