Advertisements
Advertisements
प्रश्न
A body of mass m moving with a velocity v is acted upon by a force. Write an expression for change in momentum in each of the following cases: (i) When v << c, (ii) When v → c and (iii) When v << c but m does not remain constant. Here, c is the speed of light.
उत्तर
(i) When v << c,
Δp = Δ(mv) = mΔv
(ii) When v → c,
Δp = Δ(mv)
(iii) When v<<c but m does not remain constant.
Δp = Δ(mv)
APPEARS IN
संबंधित प्रश्न
Explain why a cricketer moves his hands backwards while holding a catch.
If the tension in the cable supporting an elevator is equal to the weight of the elevator, the elevator may be
(a) going up with increasing speed
(b) going down with increasing speed
(c) going up with uniform speed
(d) going down with uniform speed
In a TV picture tube, electrons are ejected from the cathode with negligible speed and they attain a velocity of 5 × 106 m/s in travelling one centimetre. Assuming straight-line motion, find the constant force exerted on the electrons. The mass of an electron is 9.1 × 10−31 kg.
Define linear momentum and state its S.I. unit.
Two bodies A and B of same mass are moving with velocities v and 2v, respectively. Compare their (i) inertia and (ii) momentum.
What do you mean by linear momentum of a body?
Which of the following has the largest inertia?
Name the physical quantity which equals the rate of change of linear momentum.
In the previous problem (5.3), the magnitude of the momentum transferred during the hit is ______.
The position time graph of a body of mass 2 kg is as given in figure. What is the impulse on the body at t = 0 s and t = 4 s.
