A ball is thrown vertically up (taken as $+z-$ axis) from the ground. The correct momentum-height $(p-h)$ diagram is
A body, whose momentum is constant, must have constant
A body of mass $3\, kg$ hits a wall at an angle of $60^o$ and returns at the same angle. The impact time was $0.2 \;.s$ Calculate the force exerted on the wall
A girl riding a bicycle along a straight road with a speed of $5\,ms^{-1}$ throws a stone of mass $0.5\, kg$ which has a speed of $15\,ms^{-1}$ with respect to the ground along her direction of motion. The mass of the girl and bicycle is $ 50\, kg$. Does the speed of the bicycle change after the stone is thrown ? What is the change in speed, if so ?
A trolley containing water has total mass $4000\, kg$ and is moving at a speed of $40\, m/s$. Now water start coming out of a hole at the bottom of the trolley at the rate of $8\,kg/s$. Speed of trolley after $50\, s$ is ............ $m/s$
The position-time graph of a body of mass $2\, kg$ is as given in figure. What is the impulse on the body at $t = 0\, s$ and $t = 4\, s$.