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Effect of Nature of Surface on Friction

Two bodies of...

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Two bodies of masses 4 kg 9 kg are moving on a rough horizontal surface with same speed. If the coefficient of friction for them is same then ratio of dis†an ce travelled by the two bodies before coming rest

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Q. Two bodies of masses

1 k g

2 k g

are projected with same velocities, on two rough surfaces whose coefficients of friction are

0.2

0.4

respectively. Find the ratio of distances travelled by them before their velocities become half of the initial value.

Q. Two bodies of masses

1 k g

2 k g

are projected with same velocities, on two rough surfaces whose coefficients of friction are

0.2

0.4

respectively. Find the ratio of distances travelled by them before their velocities become half of the initial value.

Q. Two bodies having same mass,

2

k g

each, have different surface area

50 m^{2}

100 m^{2}

in contact with a horizontal plane. If the coefficient of friction is

0.2

, the ratio of frictional forces that come into play when the bodies are in motion, will be:

Q. The initial velocity of a body moving on a rough horizontal surface having coefficient of kinetic friction

0.5

15 m/s

. Distance after which it will come to rest is

s_{1}

. If coefficient of kinetic friction is reduced to

0.3

, distance travelled by the body before coming to rest is

s_{2}

s_{1} + s_{2}

g = 10 {m/s}^{2}

)

Q. The initial velocity of a body moving on a rough horizontal surface having coefficient of kinetic friction

0.5

15 m/s

. Distance after which it will come to rest is

s_{1}

. If coefficient of kinetic friction is reduced to

0.3

, distance travelled by the body before coming to rest is

s_{2}

s_{1} + s_{2}

g = 10 {m/s}^{2}

)

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