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A rectangular block is held against a ve...

A rectangular block is held against a vertical wall by applying a force of 200N normal to the wall. If the frictional froce just prevents the block from sliding down the wall, what is the mass of the block? (The coefficient of static friction between the block and the wall is 0.49)

A

5 kg

B

7.5 kg

C

10 kg

D

15 kg

Text Solution

Verified by Experts

The correct Answer is:
C

For equilibrium, P=R and `f_s=W=mg`
`:." " mu_s=(f_s)/R=(mg)/P`
`m=(mu_sxxP)/g=(0.49xx200)/(9.8)`
`:." "m=10kg`
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