Write one word for the following.
1. The frictional force offered when sliding an object
2. The rapid back and forth movement of a body a central position
3. This is used to measure seismic waves
4. The angle between the reflected ray and the normal
5. Forces that act on objects by direct of indirect physical contact.

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Solution

1.Sliding friction
2.Vibration
3.Seismograph
4.Angle of reflection
5.Contact force

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q

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1.Sliding friction2.Vibration3.Seismograph4.Angle of reflection5.Contact force

1.Sliding friction
2.Vibration
3.Seismograph
4.Angle of reflection
5.Contact force