Question

In a certain code language. If "+" means
“-“,“- “means "x", "x" means "-" and "-"
means “+”, the simplify the following
expression: 42 x 7 - 8 + 25 = 63 x 9
​

Answer 1

Answer:

Answer :

Angle between Force and displacement = 60°

Given :

Displacement of body, s = 5 m

Force applied, F = 50 N

Work done, W = 125 J

To find :

Angle between Force and displacement, θ = ?

Formula required :

Work done is given by the scalar product of Force and displacement vector

     W = F s  cos θ

[ where W is the work done, F is the force applied, s is the displacement and θ is the angle between Force and displacement vector ]

Solution :

Using formula

→ W = F s  cos θ

→ 125 = ( 50 ) ( 5 ) cos θ

→ 125 = 250 cos θ

→ cos θ = 125 / 250

→ cos θ = 1 / 2

also, cos 60° = 1 / 2, therefore,

→ θ = 60°

Hence,

Angle between Force and displacement will be 60° .