A body is dropped on ground from a height $h_1$ and after hitting the ground, it rebounds to a height $h _2$ If the ratio of velocities of the body just before and after hitting ground is $4$, then percentage loss in kinetic energy of the body is $\frac{x}{4}$. The value of $x$ is $.......$
A body is dropped on ground from a height $h_1$ and after hitting the ground, it rebounds to a height $h _2$ If the ratio of velocities of the body just before and after hitting ground is $4$, then percentage loss in kinetic energy of the body is $\frac{x}{4}$. The value of $x$ is $.......$
- [JEE MAIN 2023]
- A
$374$
- B
$373$
- C
$375$
- D
$365$
Similar Questions
Consider a rubber ball freely falling from a height $h = 4.9\, m$ on a horizontal elastic plate. Assume that the duration of collision is negligible and the collision with the plate is totally elastic. Which one of the following graph represents the velocity as a function of time and the height as a function of time ?
Consider a rubber ball freely falling from a height $h = 4.9\, m$ on a horizontal elastic plate. Assume that the duration of collision is negligible and the collision with the plate is totally elastic. Which one of the following graph represents the velocity as a function of time and the height as a function of time ?
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A thin uniform bar lies on a frictionless horizontal surface and is free to move in any way on the surface. Its mass is $0.300\, kg$ and length is $2 \,m$ . Two particles each of mass $0.100\, kg$ are moving on the same surface and towards the two ends of the bar in the direction perpendicular to the bar such that one with velocity $10\, m/s$ towards one end and the other with velocity $5\, m/s$ towards the other end. If collision between particles and bar is completely elastic and both particles strike with the bar simultaneously. The velocity of centre of mass of the bar after the collision is ...... $m/s$
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