Question

A box weighing 60N slides down from the top of an inclined plane making an angle of 300 with the horizontal if the body slides 4m along the plane, calculate the work done by the force of gravity.​

Answer 1

Answer:

Given :-

Weight of box = 60 N

Angle = 30⁰

Distance slide = 4 m

To Find :-

Work done

Solution :-

We know that

\bf \: W = Fs cos\thetaW=Fscosθ

Where

F = Force applied

S = Displacement

Cos∅ = Angle made

Since,

The force applied is on the box. So,

We have

F = 60 N

S = 4

Cos∅ = 30

\sf \implies \: 60 \times 4 \times \cos({30}^{ \circ} )⟹60×4×cos(30

∘

)

\sf \implies \: 240 \times \cos( {30}^{ \circ} )⟹240×cos(30

∘

)

We know that

cos30⁰ = √3/2

\sf \implies \: 240 \times \dfrac{ \sqrt{3} }{2}⟹240×

2

3

\sf \implies \: 120 \times \sqrt{3}⟹120×

3

\sf \implies120 \sqrt{3}⟹120

3

So,

Work done is 120√3 Joules

mark it brainliest

Answer 2

αNsωєr :-

GivєN :-

• A box weighing 60 Newton's slides down from the top of an inclined plane making an angle of 300 with the horizontal, the body slides 4m along the plane.

τσ Find:

• The work done by the force of gravity.

Solution:

➾ Work = ️Fs cosθ

➾ Work = 60(4) √3/2

➾ Work = 240 √3/2

➾ Work = 120√3 Joules

✠ Hence, work done = 120√3 Joules.