A player throws a ball upwards with an initial speed of 29.4 m s^{-1} . direction of accelerat

English

Gujarati

Hindi

2.Motion in Straight Line

easy

A player throws a ball upwards with an initial speed of $29.4 \;m s^{-1}$. What is the direction of acceleration during the upward motion of the ball?

Option A

Option B

Option C

Option D

Solution

Irrespective of the direction of the motion of the ball, acceleration (which is actually acceleration due to gravity) always acts in the downward direction towards the centre of the Earth.

Standard 11

Physics

Give initial velocity of object falling freely.

easy

A body falls freely from the top of a tower. It covers $36\%$ of the total height in the last second before striking the ground level. The height of the tower is……..$m$

medium

A balloon rises, up with constant net acceleration of $10\,m / s ^2$. After $2\,s$ a particle drops from the balloon. After further $2\,s$ match the following columns. (Take $\left.g=10\,m / s ^2\right)$

colum $I$ colum $II$

$(A)$ Height of particle from ground $(p)$ $0$

$(B)$ Speed of particle $(q)$ $10$ SI unit

$(C)$ Displacement of particle $(r)$ $40$ SI unit

$(D)$ Acceleration of particle $(s)$ $20$ SI unit

hard

What is free fall ? Write equations of uniformly accelerated motion for object falling freely.

medium

A ball is released from the top of a tower of height $h$ meters. It takes $T$ seconds to reach the ground. What is the position of the ball in $\frac {T}{3}$ seconds