Q2 of 13 Page 134

What should be the angle between the force and the displacement for maximum and minimum work?

Let,

Work = W


We know,



Where,


= Force


= displacement


Let, θ = angle between &


Then,



(i) Maximum work done if




(ii) Minimum work done if




More from this chapter

All 13 →
1

A U-238 nucleus originally at rest decays by emitting an alpha- particle says with a velocity of v ms–1. The recoil (in ms–1) of the residual nucleus is?

(a)


(b)


(c)


(d)

3

When momentum of body increases by 200%, its kinetic energy increases by (a) 200% (b) 300% (c) 400% (d) 800%

 4

Two bodies of masses m1 and m2 have the same linear momentum. What is the ratio of their kinetic energies?

 5

5 examples of negative work done.