Physics
Which of the following reduces friction?
- Rough surface
- Grooves
- Streamlining
- Ridges
Force
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Answer
Streamlining
Reason — Streamlining is a process in which a body's shape is streamlined to reduce friction while grooves and ridges are used for strong grips so they increase the overall friction. Since friction is caused by irregularities (roughness) of two surfaces so more roughness means more friction and vice versa.
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Related Questions
Which of the following is not affected by force?
- Mass
- Motion
- Direction
- Shape
Which of the following is a contact force?
- Gravitational force
- Electrostatic force
- Tension
- Magnetic force
What does friction not depend on?
- Weight of the body
- Nature of surface
- Area of surface in contact
- Temperature
Give reasons for the following statements.
(a) Two bodies must interact with one another for force to act.
(b) Force can change the speed of a body.
(c) Friction depends on the weight of a body.
(d) Static friction is more than kinetic friction.
(e) Rollers and ball bearings are used to reduce friction.