A ball is thrown from a roof top at an angle of $45^o$ above the horizontal. It hits the ground a few seconds later. At what point during its motion, does the ball have $(a)$ greatest speed $(b)$ smallest speed $(c)$ greatest acceleration - Explain.

Vedclass pdf generator app on play store
Vedclass iOS app on app store

Consider the given figure in which a ball is projected from point 0 and goes to c through $\mathrm{A}$ and $\mathrm{B}$.

Ground

$(a)$ At point B, it will gain the same speed $v_{0}$ and after that speed increases and will be maximum just before reaching at$ C$.

$(b)$ During upward journey from $0$ to $A$ speed decreases and will be minimum at point A.

$(c)$ Acceleration is always constant and is equal to $g$.

885-s145

Similar Questions

A body of mass $1\,kg$ is projected with velocity $50\,m / s$ at an angle of $30^{\circ}$ with the horizontal. At the highest point of its path a force $10\,N$ starts acting on body for $5\,s$ vertically upward besides gravitational force, what is horizontal range of the body? $\left(g=10\,m/s^2\right)$

A stone is just released from the window of a train moving along a horizontal straight track. The stone will hit the ground following

For a given velocity, a projectile has the same range $R$ for two angles of projection if $t_1$ and $t_2$ are the times of flight in the two cases then

  • [AIEEE 2004]

A person is standing on an open car moving with a constant velocity of $30\,\,m/s$  on a straight horizontal road. The man throws a ball in the vertically upward direction and it returns to the person after the car has moved $240\,\,m.$  The speed and the angle of projection

A body of mass $m$ is thrown upwards at an angle $\theta$ with the horizontal with velocity $v$. While rising up the velocity of the mass after $ t$ seconds will be