Question

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A body of mass m moving in a
straight line with constant speed
10m/s . Two equal in magnitude
but opposit in direction forcess start acting on the body. Which of thefollowing will youe observe


a) The speed of the body changes but direction of motion remains same.



b) The speed of the body remains same but direction of motion changes.



c) Both speed and direction of motion change.



d) The body continues to move with same speed in the same direction.​

Answer 1

Answer:

Earthquakes: Movement of the Earth’s Crust

Earthquakes are the shaking and moving of the ground when energy is released in waves. These

waves are called seismic waves. These waves are similar to ocean waves, which move through

water. Seismic waves, however, move through the ground. Most earthquakes are caused by the

movement of large sections of the Earth’s crust, called plates. The place where two plates meet

is called a fault. Faults look like large cracks in the ground. If the two plates move in different

directions, they build up energy at the fault line. When enough energy builds up, the stress on the

fault becomes too great and it ruptures. This releases the energy and the

ground starts to shake.

Earthquakes can also be caused by other natural events, such as landslides and volcanoes. Man-

made earthquakes happen because of nuclear testing and mining explosions. The first movement

of an earthquake, called the main shock, is often followed by smaller ground trembles, called

aftershocks. These aftershocks are the plates settling into their new position. Aftershocks can

continue for days after the main shock. There are an estimated 500,000 earthquakes around the

world each year. Most are so mild they are only recorded on scientific instruments. Only about

100,000 can be felt by humans. Of these, only about 19 a year cause major damage.

Major earthquakes in populated areas can cause huge destruction. Buildings collapse, roads and

bridges buckle and crack, and electrical and gas lines break and cause fires. If the earthquake

happens in the ocean, it makes a series of huge ocean waves called a tsunami. The tsunami

travels until it finally reaches land, where it causes large flooding. Scientists are searching for

ways to predict earthquakes. They study the historical patterns of earthquakes and monitor the

movement of the plates with seismic equipment. While they cannot predict an exact date of a

future earthquake, they have a better understanding of when earthquakes are more likely to

happen.

List out different Adjectives from the passage and name them.