Question

6. Which of the following statements is incorrect?



(a) Friction acts on a ball rolling along the ground.
(b) Friction acts on a boat moving on water.
(c) Friction acts on a bicycle moving on a smooth road.
(d) Friction does not act on a ball moving through air.

Answer 1

Answer:

D is the incorrect one.

Explanation:

As friction can also be acting on a ball moving through the air.

Answer 2

Question

Which of the following statements is incorrect?  

(a) Friction acts on a ball rolling along the ground.

(b) Friction acts on a boat moving on water.

(c) Friction acts on a bicycle moving on a smooth road.

(d) Friction does not act on a ball moving through air.

$\rule{300}{1}$

Answer

(a) When we roll a ball on the ground it eventually stops at a particular time due to friction. If friction was not existing then this ball wouldn't stop rolling.

Therefore, this statement is correct but not the answer we require.

(b) When a boat is moving on the water it eventually stops at one point of time.

Therefore, this statement is correct but not the answer we require.

(c) Friction takes place on all type of surfaces. On some surfaces like ice the friction is less whereas on some surface like the road the friction is more. If a bicycle is moving on a smooth road the friction is less but still the friction is present over there.

Therefore, this statement is correct but not the answer we require.

(d) Friction takes place when the ball is moving through the air because the ball can't be flying in the air forever.

Therefore, this statement is incorrect but the answer we require.

∴ The answer is option D.

$\rule{300}{1}$