1. In each of the following cases, a body of weight 50 N is kept at the top of a slide. Calculate the magnitude of force that pulls it along the slide in each case.
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Answer:
Correct option is
D
20N,30N
Frictional force f=28.2cos45
o
=28.2
2
1
=20N
Normal reaction R=50−28.2sin45
o
=50−20=30N
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