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Kinetic Friction

87.A person o...

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87.A person of mass 72kg sitting on ice pushes a block of mass of 30kg on ice horizontally with a speed of 12m/s.the coefficient of friction between the man and ice and between block and ice in 0.02.if g=10m/S2, the distances between man and the block, when they come to rest is a)360m b)10m c)350m d)422.5m

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Q. A person of mass

72 K g

sitting on ice pushes a block of masses of

30 K g

on ice horizontally with a speed of

12 m s^{- 1}

The coefficient of friction between the man and ice and between block and ice in

0.02

g = 10 m s^{- 2}

. the distance between man and the block, when they come to rest is.

Q. A block of ice of mass

50 k g

is pushed out on a horizontal plane with a velocity of

5 m / s

. Due to friction it comes to rest after covering a distance of

25 m

. How much ice will melt?

Q. A man of mass

60

kg and a boy of mass

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0.4

m/s relative to ice. After

5

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Q. A block of ice of mass

50 k g

is sliding on a horizontal plane. It starts with speed

5 m / s

and stops after moving through some distance. The mass of ice that has melted due to friction between the block and the surface is:

[Assuming that no energy is lost and latent heat of fusion of ice is

80 c a l / g

J = 4.2 J / c a l

Q. A block of mass m is given a kick on frozen pond, imparting an initial speed of

v = 4 m / s

. Coefficient of friction between block and ice is

μ_{K} = 0.5

. Find the distance the block moves before stopping.

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