Acertain string breaks when a force of 200 n is exerted on it. if two people pull on opposite ends of the string, each with a force of 180 n, will the string break? explain

The string will not break.

Explanation:

Balanced force is defined as the forces which gets cancelled out when equal forces are acting in the opposite direction. The net force on the system comes out to be 0.

Unbalanced force is defined as the forces which does not get cancelled out because unequal forces act on the system in opposite direction. The motion of the object is in the direction of net force.

According to the question:

A certain string breaks when a force of 200 N is acted on it. But, two people are stretching the string from both the ends with equal forces of 180 N each.

As, the string is pulled with the force less than its breaking force. So, it will not break and also the two forces acting on the string are balanced.

Hence, the string will not break.

0.19 m/s and 0.45 m/s

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.