Question

ball bearing streamlining polishing spikes on shoes find the odd one out and give the reasons ​

Answer 1

Required Answer:

Ball bearing, Streamlining , Polishing , Spikes on shoes.

Odd one → Spikes on shoes

How?

Reason ↓

• Ball bearing, Streamlining and polishing are the methods used to reduce the friction.

• Whereas, spikes on the shoes is a method to increase friction.

Thus, spikes on shoes is the odd one.

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Learn more!

◆ What is friction ?

→ Friction is the force that resists the motion of an object or retards(slow down) the motion.

● It always acts in the opposite direction to that of the motion of the body.

◆ Some ways to increase friction :

• By pushing the surfaces together.
• By using brakes pads in vehicles.
• By applying coarse substance on hand.

◆ Some ways to reduce friction:

• By polishing.
• By greasing.
• By applying lubricants.

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Answer 2

“Spikes on shoes”

Reason: Ball bearing, streamlining and polishing are used to reduce frictional force.

• Ball bearing: Used to reduce friction between two mating parts.
• Streamlining: It is a system where the objects can pass freely with every particle of the fluid they are passing from. Birds, aeroplane and race cars take the advantage of streamline motion.
• Polishing: This method reduces friction in the surface of the items.

But in case of spiked shoes, (often used by football players) these increase friction.