Laws of Motion 3 Question 10

10. What is the maximum value of the force F such that the block shown in the arrangement, does not move?

(2003, 2M)

(a) 20N

(b) 10N

(c) 12N

(d) 15N

Show Answer

Answer:

Correct Answer: 10. (a)

Solution:

  1. Free body diagram (FBD) of the block (shown by a dot) is shown in figure.

For vertical equilibrium of the block

N=mg+Fsin60=3g+3F2

For no motion, force of friction

fFcos60 or μNFcos60 or 1233g+3F2F2 or gF2 or F2g or 20N

Therefore, maximum value of F is 20N.



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक