Last Updated On 16-03-2023 - By Jeesha Sara
A piece of wood of mass 0.03 kg is dropped from the top of a mass 0.02 kg is fired vertically upward, with a velocity 100
, from the ground. The bullet gets embedded in the wood. Then the maximum height to which the combined system reaches above the top of the building before falling below is : (g=10
)
(a)
30m
(b)
10m
(c)
40m
(d)
20m
A piece of wood of mass 0.03 kg is dropped from the top of a mass 0.02 kg is fired vertically upward, with a velocity 100 , from the ground. The bullet gets embedded in the wood. Then the maximum height to which the combined system reaches above the top of the building before falling below is : (g=10 )
(a)
30m
(b)
10m
(c)
40m
(d)
20m
Question ID - 50231 :-
A piece of wood of mass 0.03 kg is dropped from the top of a mass 0.02 kg is fired vertically upward, with a velocity 100 , from the ground. The bullet gets embedded in the wood. Then the maximum height to which the combined system reaches above the top of the building before falling below is : (g=10 )
(a)
30m
(b)
10m
(c)
40m
(d)
20m
|
A piece of wood of mass 0.03 kg is dropped from the top of a mass 0.02 kg is fired vertically upward, with a velocity 100 |
|||
|
(a) |
30m |
(b) |
10m |
|
(c) |
40m |
(d) |
20m |
Time taken for the particles to collide,
T=
=
=1sec
Speed of wood just before collision=gt=10m/s & and speed of bullet just before collision v−gt =100−10=90 m/s
Now, conservation of linear momentum just before and after the collision
(0.02) (1v) + (0.02) (9v)= (0.05)v
⇒150 = 5v
⇒ v = 30m/s
Max. height reached by body h=
h=
=45m
Height above tower =40m
Next Question :
|
The density of a material in SI units is 128 kg |
|||
|
(a) |
410 |
(b) |
640 |
|
(c) |
16 |
(d) |
40 |
. In certain units in which the unit of length is 25 cm and the unit of mass is 50 g, the numerical value of density of the material isView Topper Answer
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