A train normally travels at a constant speed of 24 m/s over a long straight section of railway line. Because of track repairs taking place on a 1km stretch of the railway line, the train is restricted to travel at 6 m/s over this stretch. In order to comply with the speed limit, the train approaching at 24 m/s slows down uniformly to omst over a distance of 100 m extending up to the start of the section under repair. From the end of the 1 km restriction zone, the train accelerates to 24 m/s over a further distance of 1 km. How much time does the train lose on
the whole trip?

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg

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.