Friction Class 8 Worksheet with Solved in Pdf
Friction Class 8 Worksheet: In this page we have included Friction Chapter from Grade 8 Worksheet with solution.
Q.A.) Define friction force.
Answer:- Friction force is the force generated by two surfaces that contact and slide against each other.
B.) What are the factors which affects friction?
Answer:- 1. The roughness of the area.
2.) The weight of object.
3.) The surface area.
C.) What are lubricants?
Answer:- The substances which reduce friction are called lubricants.
D.) Define rolling friction.
Answer:- When one body rolls over the surface of another body, the resistance to its motion is called rolling friction.
E.) Explain spring balance.
Answer:- 1. Spring balance is a device used for measuring the force acting on an object.
2.) It consists of a colled spring which gets stretched when a force is applied to it. 3.) Stretching of the spring is measured by a pointer moving on a graduated scale. 4.) The reading on the scale gives the magnitude of the force.
Q.F.) Fill in the blanks.
1.) The frictional force exerted by fluids is also called as drag.
Q.G. State whether the following statements are true or false.
1.) Friction is caused by the irregularities on the two surfaces in contact.
Answer:- True
2.) Friction does not produce heat.
Answer:- False
3.) Friction is an evil too .
Answer:- True
4.) The rolling friction is larger than the sliding friction.
Answer:- False
5.) Friction can be decreased by making a surface rough.
Answer:- False
Also See: Class 8 Science Worksheets