Find out acceleration of the block. Initially the block is at rest. μ s = 0.5 μ k = 0.3 Options: A . &nbsp0.1 m/s2 B . &nbsp2.1 m/s2 C . &nbsp1 m/s2 D . &nbsp2 m/s2

Find out acceleration of the block. Initially the block is at rest. μs = 0.5

Question

Find out acceleration of the block. Initially the block is at rest.

μ_{s}

= 0.5

μ_{k}

= 0.3

Options:

A . 0.1 m/s2

B . 2.1 m/s2

C . 1 m/s2

D . 2 m/s2

Answer: Option B
:
B

\leq

f_{s}

\leq

μ_{s}

N
0

\leq

f_{s}

\leq

50
51 > 50
Now

∴

Block will move but if the block starts moving then kinetic friction is involved.

f_{k}

μ_{k}

N = 0.3

\times

100 = 30 N

∴

51 - 30 = 10a

∴

a = 2.1 m/

s^{2}

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