Question

What is the minimum value of F needed so that block begins to move upward on frictionless incline
plane as shown?
block increases
ck increases
ce decreases
(1) Mg tan
(2) Mg cot
Mg sin e
(3)
(1+sin)
(4) Mg sin​

Answer 1

Answer:

Using equilibrium conditions,

Mgsinθ=F+Fcosθ

Mgsinθ=F(1+cosθ)

⇒F=

1+cosθ

Mgsinθ

=

2cos

2

2

θ

Mg×2sin

2

θ

×cos

2

θ

=Mgtan

2

θ