A football player throws a ball with a velocity of 50 metre/sec at an angle 30 degrees from horizont

English

Gujarati

Hindi

3-2.Motion in Plane

easy

A football player throws a ball with a velocity of $50$ metre/sec at an angle $30 $ degrees from the horizontal. The ball remains in the air for ...... $\sec$ $(g = 10\,m/{s^2})$

A

$2.5$

B

$1.25$

C

$5$

D

$0.625$

Solution

(c)Time of flight$ = \frac{{2\,u\sin \theta }}{g}$=$\frac{{2 \times 50 \times \sin 30}}{{10}} = 5s$

Standard 11

Physics

Share

Similar Questions

A particle is projected from a point $A$ with velocity $u\sqrt 2$ at an angle of $45^o$ with horizontal as shown in fig. It strikes the plane $BC$ at right angles. The velocity of the particle at the time of collision is

hard

A particle projected from ground moves at angle $45^{\circ}$ with horizontal one second after projection and speed is minimum two seconds after the projection. The angle of projection of particle is [Neglect the effect of air resistance]

hard

A missile is fired for maximum range with an initial velocity of $20\; m/s$. If $g = 10 \;m/s^2$ , the range of the missile is …… $m$

medium

(AIPMT-2011)

An object is projected from ground with speed $u$ at angle $\theta$ with horizontal. the radius of curvature of its trajectory at maximum height from ground is ……….

medium

An object of mass $10 \,kg$ is projected from ground with speed $40 \,m / s$ at an angle $60^{\circ}$ with horizontal. The rate of change of momentum of object one second after projection in SI unit is …….. [Take $g=9.8 \,m / s ^2$ ]

easy