Question
A particle falls towards earth from infinity. It’s velocity on reaching the earth would be
✓
Answer
(b)This should be equal to escape velocity i.e.$\sqrt {2gR} $
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The charge deposited on $4\,\mu F$ capacitor in the circuit is
→A thermodynamic process is the pressure and volumes corresponding to some points in the figure are, $P_A = 3 \times 10^4 Pa$, $V_A = 2 \times 10^{-3}\, m^3$, $P_B = 8 \times 10^4 Pa$, $V_D = 5 \times 10^{-3}\,m^3$. In process $AB, 600\, J$ of heat and in process $BC, 200\, J$ of heat is added to the system. The change in the internal energy in process $AC$ would be .... $J$
→$A$ rod closing the circuit shown in figure moves along a $U$ shaped wire at a constant speed $v$ under the action of the force $F$. The circuit is in a uniform magnetic field perpendicular to the plane. Calculate $F$ if the rate of heat generation in the circuti is $Q$.
→When a forward bias is applied to a $p-n$ junction, it
→When an ideal diatomic gas is heated at constant pressure, the fraction of the heat energy supplied which increases the internal energy of the gas, is
Which one of the following statements does not hold good when two balls of masses $m _1$ and $m _2$ undergo elastic collision
→The figure shows the position - time $(x-t)$ graph of one-dimensional motion of the body of mass $0.4\; kg$. The magnitude of each impulse is
→If a photon has velocity $c$ and frequency $\nu$, then which of following represents its wavelength
→Equal charges are given to two spheres of different radii. The potential will
The distance between a convex lens and a plane mirror is $10 \,cm$. The parallel rays incident on the convex lens after reflection from the mirror form image at the optical centre of the lens. Focal length of lens will be.....$cm$
→