Two masses $M$ and $m$ are connected by a weightless string. They are pulled by a force $F$ on a frictionless horizontal surface. The tension in the string will be
$\frac{{FM}}{{m + M}}$
$\frac{F}{{M + m}}$
$\frac{{FM}}{m}$
$\frac{{Fm}}{{M + m}}$
The horizontal acceleration that should be given to a smooth inclined plane of angle $sin^{-1}\, (1/l)$ to keep an object stationary on the plane relative to the inclined plane is
For given systen ${\theta _2}$ ....... $^o$
Give the magnitude and direction of the net force acting on
$(a)$ a drop of rain falling down with a constant speed,
$(b)$ a cork of mass $10\; g$ floating on water,
$(c)$ a kite skillfully held stationary in the sky,
$(d)$ a car moving with a constant velocity of $30\; km/h$ on a rough road,
$(e)$ a high-speed electron in space far from all material objects, and free of electric and magnetic fields.
Calculate $T_1$ and $T_2$
Define $SI$ unit of force $N$. Define $CGS$ unit of force dyne.