25.
и
B
A
A long rectangular block A of mass 2m is placed on a
smooth horizontal surface and another small block B of
mass m is place on block A as shown. The block B is
given an initial speed of u in the horizontal direction as
shown. If the coefficient of friction between the blocks
is
u then
u
a) the blocks will reach a final common velocity of magnitude
3
b) the work done against friction is two-third of the initial kinetic energy of B
c) before the blocks reach a common velocity, the acceleration of A relative to B is
2
ug
3
d) before the blocks reach a common velocity, the acceleration of A relative to B is
3
ug
Answers
Answer:
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Explanation:
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11th
Physics
Work, Energy and Power
Collisions in Two Dimensions
A block ' A ' of mass 2m is...
PHYSICS
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Asked on December 29, 2019 by
Yukta Mohommad
A block 'A' of mass 2m is placed on another block 'B' of mass 4m which in turn is placed on a fixed table. The two blocks have the same length 4d and they are placed as shown in figure. The coefficient of friction (both static and kinetic) between the block 'B' and table is μ. There is no friction between the two blocks. A small object of mass m moving horizontal along a line passing though the centre of mass of the block B and perpendicular to its face with speed v collides elastically with the block B at a height d above the table.
(a) What is the minimum value of v call it v
0
required to make the block A topple?)
(b) If v=2v
0
, find the distance (from the point P in the figure) at which the mass m falls on the table after collision. (Ignore the role of friction during the collision.)
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