4-2.Friction
medium

$2\, kg $નો બ્લોક અને સપાટી વચ્ચેનો સ્થિત ઘર્ષણાંક  $0.4$ છે.તેના પર $2.5\, N $નું બળ લગાવતા તેના પર ........ $N$  ઘર્ષણબળ લાગશે.

A

$2.5 $

B

$5$

C

$7.84$

D

$10$

Solution

(a) Applied force $ = 2.5\;N$

Limiting friction $ = \mu mg = 0.4 \times 2 \times 9.8 = 7.84\;N$

For the given condition applied force is very smaller than limiting friction.

$\therefore $ Static friction on a body = Applied force $= 2.5 \,N$

Standard 11
Physics

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