Athletes wear spikes to increaseRequired to answer. Single choice. 

(1 Point)

Electrostatic force

Muscular force

gravitational force

Frictional force

55,

Which of these is not true about friction? i. Friction tends to stop a moving object ii. Friction tends to stop a stationary object from moving iii. Friction acts in the same direction as the direction of motion. iv. Friction always help motionRequired to answer. Single choice.



(1 Point)

(i) and (iv)

(i) and (ii)

(iii) and (iv)

(ii) and (iii)

Which of the following is used to reduce friction?Required to answer. Single choice.



(1 Point)

Spikes in the athletic shoes

Set of grooved tyres

grinding stone

Ball bearing

77,

Sliding frictionRequired to answer. Single choice.

(1 Point)

is always greater than static friction

is always greater than rolling friction

is always smaller than rolling friction

may be smaller or greater than rolling friction depending on the surface

88,

In which case is friction a disadvantage?Required to answer. Single choice.

(1 Point)

Running a machine

writing

walking

Applying brakes

99,

The resistance offered by fluidsRequired to answer. Single choice.

(1 Point)

drug

drag

opposite motion

sliding friction

1010,

Which of the following is a contact force? (i) Gravitational force (ii) Electrostatic force (iii) frictional force ( iv) muscular forceRequired to answer. Single choice.

(1 Point)

(iii) and (iv)

( ii) and (iii)

(i) and (iv)

(i) and (ii)

plss tell all the answers its actually options so u can just tell like its the first one for this question in anyways plsss hel
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