Question

Which one of the following activities will produce least amount of frictional force?
(1) Walking
(2) Running
(3) Ice-skating
(4) Rowing a boat​

Answer 1

Explanation:

Ice Skating will produce less amount of frictional force

Answer 2

(3) Ice-skating.

• Two surfaces that come into contact and glide against one another produce frictional force. There are some factors that impact the frictional force and they are: Surface roughness and the amount of force pressing them together have the biggest and the most crucial impact on these forces.
• The force that assists in preventing motion when the surfaces of two objects come into contact is known as friction.
• Friction lessens a machine's mechanical advantage, or, friction decreases the output to input ratio. A car spends one-fourth of its energy reducing friction.
• Ice’s low friction is caused by a thin layer of liquid water that covers its surface. Therefore, skaters on delicate metal blades can glide across the ice rink without any amount of accidents but come to a grinding halt when they reach the wooden floor beyond.

Hence, option 3 is correct.

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