Question

Assertion: If friction was eliminated
permanently from nature, the motion of
all the bodies on earth will be more
effective
Reason: Friction causes wear and tear
in shoes and tires. It also produces heat
and noise during contact motion.
Both Assertion and Reason are
a. true, Reason is the correct
explanation for Assertion
Both Assertion and Reason are
b. true, Reason is not the correct
explanation for Assertion.

c. Only Assertion is true.
d. Only Reason is true.​

Answer 1

Answer:

only reason is true

Explanation:

we cannot do anything without friction like walking

Answer 2

Although friction causes wear and tear it is useful in everyday life and cannot be eliminated. Hence d. Only Reason is true.​

Explanation:

• Friction can be found when two surfaces are in contact and it always opposes the movement between surfaces. So it is known as a resistive force which opposes motion.
• Friction is undesirable because it produces heat which cause wear and tear in machinery. Since it is resistive to motion, more energy is required to overcome friction.
• Though it has above disadvantages it is still helpful in everyday activities. We cannot walk, run or write without friction.
• Surfaces tend to be more slippery in absence of friction and it may lead to accidents. Hence friction cannot be permanently eliminated.