Question

a force f 100root3 is applied on a block kept on the smooth surface in contact with the wall. if the block is at rest, the force applied by block on surface (1) is f1 and on surface (2) is f2. find f1/f2 take g=10m/s^2

Answer 1

Answer:

Correct option is

C

4 m/s

2

, 12N

Force applied is 20N

Normal reaction by wall is equal to force applied 20N

friction force (static) = normal reaction X coff. of static friction

= 0.8X20

=16N (upward)

friction force kinetic = normal reaction X coff. of kinetic friction

=0.6X20

=12N (upward)

Motion of block is in downward direction due to gravitational force

acceleration of block is =

2

20−12

= 4ms

−2

(downward)

Answer 2

Answer:

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Explanation:

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