Exercise-1

A solid sphere and a hollow sphere are thrown horizontally from a cliff with equal velocities, respectively. Then which sphere reaches first on earth ?

A man is in a moving train, then with respect to train :

The distance travelled by a particle starting from rest and moving with an acceleration  $\frac{4}{3} \mathrm{m} {\mathrm{s}}^{-2}$ in the third second is:

$\int \left(1+{\tan }^2\theta \right)d\theta$

${\int }_{1/2}^{3/2}\left(-2x+4\right)dx$

${\int }_0^{\pi /2}{\theta }^{2}d\theta$

${\int }_0^{3b}{x}^{2}dx$

The forces, each numerically equal to $5 N$; are acting as shown in the Figure. Find the angle between forces?