A player throws a ball upwards with an initial speed of 29.4 m s^{-1} Choose x=0 m and t=0 s to be l

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2.Motion in Straight Line

easy

A player throws a ball upwards with an initial speed of $29.4\; m s^{-1}$ Choose the $x=0$ m and $t=0$ s to be the location and time of the ball at its highest point, vertically downward direction to be the positive direction of $x$ -axis, and give the signs of position, velocity and acceleration of the ball during its upward, and downward motion.

Option A

Option B

Option C

Option D

Solution

During upward motion, the sign of position is positive, sign of velocity is negative, and sign of acceleration is positive. During downward motion, the signs of position, velocity, and acceleration are all positive.

Standard 11

Physics

A rocket is fired upward from the earth's surface such that it creates an acceleration of $19.6 \,m/sec^2$. If after $5 \,sec$ its engine is switched off, the maximum height of the rocket from earth's surface would be………$m$

hard

Two balls $A$ and $B$ are thrown with same velocity $u$ from the top of a tower. Ball $A$ is thrown vertically upwards and the ball $B$ is thrown vertically downwards. If $t_A = 6\ s$ and $t_B = 2\ s$ then velocity $u$ of each ball is…….$ms^{^{-1}}$

medium

Two bodies of masses $1 kg$ and $5 kg$ are dropped gently from the top of a tower. At a point $20 cm$ from the ground, both the bodies will have the same

easy

A ball is thrown upwards. It takes $4\,sec$ to reach back to the ground. Its initial velocity is……..$ms^{-1}$

easy

A body dropped from the top of a tower covers a distance $7 x$ in the last second of its journey, where $x$ is the distance covered in first second.$………\,s$ time does it take to reach the ground.

medium

Solution

Similar Questions

A rocket is fired upward from the earth's surface such that it creates an acceleration of $19.6 \,m/sec^2$. If after $5 \,sec$ its engine is switched off, the maximum height of the rocket from earth's surface would be………$m$

Two balls $A$ and $B$ are thrown with same velocity $u$ from the top of a tower. Ball $A$ is thrown vertically upwards and the ball $B$ is thrown vertically downwards. If $t_A = 6\ s$ and $t_B = 2\ s$ then velocity $u$ of each ball is…….$ms^{^{-1}}$

Two bodies of masses $1 kg$ and $5 kg$ are dropped gently from the top of a tower. At a point $20 cm$ from the ground, both the bodies will have the same

A ball is thrown upwards. It takes $4\,sec$ to reach back to the ground. Its initial velocity is……..$ms^{-1}$

A body dropped from the top of a tower covers a distance $7 x$ in the last second of its journey, where $x$ is the distance covered in first second.$………\,s$ time does it take to reach the ground.

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