1. When force is applied along with the irregularities, friction____.
2. Motion of pistons in a cylinder is an application of _____
3. The force that resists any type of movement is known as ____
4. _____ reduces efficiency.
II. Answer the following questions. 6M.
5. Explain why sliding friction is less than static friction?
6. Give an example to illustrate the existance of force of friction?
7. State two factors which directly after the force of friction?
Answers
01. When force is applied along with the irregularities, friction increases.
02.
03. The force that resists any type of movement is known as frictional force.
04.
05. Friction comes into play when irregularities present in the surfaces of two objects in contact get interlocked with each other. In sliding, the time given for interlocking is very small. Hence, interlocking is not strong. Therefore, less force is required to overcome this interlocking. Because f this reason, sliding friction is less than static friction.
06. The asphalt rubs against the tires, causing friction force, which changes your direction and speed. Water is another medium that can provide friction. You can also see friction in the book that slides more easily across a smooth table than the concrete floor.
07. The smoothness of the surface. The presence of solid, liquid or gas around the moving bod
Answer:
1. force
2.friction
3.motion
4.gravitation
5.In static friction we have to apply force and in sliding friction there is having no to apply force nor any gravitational force is behaving. So, sliding friction is less than static friction.
6.a nail pin
7.no I don't no