A man standing on the edge of the terrace of a high rise building throws a stone vertically up with a speed of 20 m/s. Two seconds later, an identical stone is thrown vertically downwards with the same speed of 20 m/s. Then
a)
The relative velocity between the two stones remains constant till one hits the ground
b)
Both will have the same kinetic energy, when they hit the ground
c)
The time interval between their hitting the ground is 2 s
d)
If the collision on the ground is perfectly elastic, both will rise to the same height above the ground
A man standing on the edge of the terrace of a high rise building throws a stone vertically up with a speed of 20 m/s. Two seconds later, an identical stone is thrown vertically downwards with the same speed of 20 m/s. Then
a)
The relative velocity between the two stones remains constant till one hits the ground
b)
Both will have the same kinetic energy, when they hit the ground
c)
The time interval between their hitting the ground is 2 s
d)
If the collision on the ground is perfectly elastic, both will rise to the same height above the ground
Question ID - 100591 | SaraNextGen Top Answer
A man standing on the edge of the terrace of a high rise building throws a stone vertically up with a speed of 20 m/s. Two seconds later, an identical stone is thrown vertically downwards with the same speed of 20 m/s. Then
a)
The relative velocity between the two stones remains constant till one hits the ground
b)
Both will have the same kinetic energy, when they hit the ground
c)
The time interval between their hitting the ground is 2 s
d)
If the collision on the ground is perfectly elastic, both will rise to the same height above the ground
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A man standing on the edge of the terrace of a high rise building throws a stone vertically up with a speed of 20 m/s. Two seconds later, an identical stone is thrown vertically downwards with the same speed of 20 m/s. Then |
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a) |
The relative velocity between the two stones remains constant till one hits the ground |
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b) |
Both will have the same kinetic energy, when they hit the ground |
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c) |
The time interval between their hitting the ground is 2 s |
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d) |
If the collision on the ground is perfectly elastic, both will rise to the same height above the ground |
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(a,b,c,d) a.
Clearly, it is time independent, i.e., relative velocity between the two stones remains constant b. In both the cases, the total energy remains the same c. and d. These are simple constant |
20 m/s