8Class Friction Test 3

In the given below friction, which friction is self adjusting force?

• sliding friction
• static friction
• rolling friction
• fluid friction

The change in the length the spring is _______to applied force.

• indirect proportional
• equal
• direct proportional
• not depend on the force

Friction is said to be a friend, because it helps

• to walk on a road
• to hear sound
• to see a book
• to think a problem

Which of the following play major roll to avoid corrosion due to friction?( paints, lubricant, alloys, galvanizing)

• paints
• lubricant
• alloys
• galvanizing

Don't throw over the roads, they may cause slip" is applicable to.

• bananas
• oils
• sand
• bananas, oils and sand

This gives to bird and fish to overcome from drag

• colour of the body
• shape of the body
• mass of the body
• above all

Which of the following is correct?( friction is good , friction is evil, both A&B, none of these)

• friction is good
• friction is evil
• Frictio is good and evil
• Frictio is neither good nor evil

The friction exerted by a rolling body is

• Static friction
• sliding friction
• rolling friction
• none of these

________is responsible for over heating and wearing out of moving parts.

• normal force
• friction
• tension
• gravitational force

Gymnasts apply which material on their hands to increase friction for better grip

• oil
• soaps
• coarse substance
• water