The two blocks of masses M and 2M shown above initially travel at the same speed v but in opposite directions. They collide and
1 answer:
Answer:
option B.
Explanation:
given,
Mass of the blocks 1 = M
Mass of the blocks 1 = 2 M.
initial speed of the block 1= v
initial speed of the block 2 = - v
where V is the final speed of the blocks after collision
using conservation of momentum
M v + 2 M (-v) = (M + 2 M) V
3 M V = - M v
velocity of the blocks after collision is equal to -v/3 m/s
hence, the correct answer is option B.
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Answer: 10000 kg
Explanation:
The momentum is given by the following equation:
(1)
Where:
is the mass of the object
is the velocity of the object
Now, in this case and according the conservation of momentum:
(2)
Where:
is the mass of the spacecraft
is the mass of the asteroid
is the initial velocity of the spacecraft
is the initial velocity of the asteroid (because we are told the asteroid is stationary, as the spacracft is on the sateroid it remains stationary as well)
is the final velocity of the spacecraft
is the final velocity of the asteroid
Rewritting (2):
(3)
(4)
Finding :
This is the mass of the asteroid