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Friction General Understanding

A 250 g block...

Question

A 250 g block slides on a rough horizontal table. Find the work done by the frictional force in bringing the block to rest if it is initially moving at a speed of 40 cm/s. If the friction coefficient between the table and the block is 0.1, how far does the block move before coming to rest ?

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250 g

block slides on a rough horizontal table. Find the work done by the frictional force in bringing the block to rest if it is initially moving at a speed of

40 c m / s

. If the friction coefficient between the table and the block is

0.1

, how far does the block move before coming to rest?

2 k g

of block of wood rests on a long table top. A

5 g

bullet moving horizontally with a speed of

150 m / s

is shot into the block and sticks to it. The block then slides

2.7 m

along the table top and comes to a stop. The force of friction between the block and the table is:

Q. A block weighing

10 k g

is at rest on a horizontal table. The coefficient of static friction between the block and the table is

0.5

. If a force acts down at

60^{0}

from the horizontal, how large can it be without causing the block to move? (

g = 10 m s^{- 2}

)

4 g

bullet is fired horizontally with a speed of

300 m / s

0.8

kg block of wood at rest on a table. If the coefficient of friction between the block and the table is

0.3

, how far will the block slide approximately?

Q. A horizontal force of

20

N

is applied to a block of mass

4

k g

resting on a rough horizontal table. What can be said about the coefficient of static friction between the block and the table if the block remains at rest? [

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

]

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