If `vec(F) = (5hat(i)+2hat(j) - 4hat(k))N`, the magnitude of force is

If `vec(F) = (5hat(i)+2hat(j) - 4hat(k))N`, the magnitude of force is
A. 45 N
B. `3 sqrt(5) N`
C. 10 N
D. 20 N

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

Salim Ahmed Kawsar

Correct Answer - B
Constant velocity means net acceleration is equal to zero. Therefore net pulling/pushing force is zero.
`therefore " "3mg sin 45^(@)-mg sin 45^(@)=mu(3 mg)cos45^(@)`
`therefore " "mu=(2)/(3)`

5 views Answered 2023-02-05 15:29

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