If two objects collid and one is initially at rest, is it possible for both to be at rest after the collision?
1 answer:
Answer:
<em>Is it NOT possible for both particles to be at rest after the collision</em>
Explanation:
<u>Law Of Conservation Of Linear Momentum</u>
The total linear momentum of a system of particles is conserved regardless of their internal interactions while no external force is applied to the system. If and
are the masses of two particles, and only one of them is at rest, there is a non-zero total linear momentum, i.e.
if at least one of the speeds is not zero, the total initial linear momentum is not zero.
If after the collision, both particles remain at rest, both speeds will be zero and the total linear momentum won't be conserved.
So, is it NOT possible for both particles to be at rest after the collision
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Answer:
a. about 20 years younger
b. Malcolm sits around for 49.94 years
c. <em>2.268x</em><em> m</em>
Explanation:
light travels 3x m in one seconds
in 20 years that will be 3x x 20 x 60 x 60 x 24 x 365 = 1.89x
m
for the to and fro journey, total distance covered will be 2 x 1.89x = 3.78x
m
Flo's speed = 80% of speed of light = 0.8 x 3x = 2.4x
m/s
time that will pass for Malcolm will be distance/speed = 3.78x /2.4x
= 1575000000 s = <em>49.94 years</em>
the relativistic time t' will be
t' = t x
t' = 49.94 x
t' = 49.94 x 0.6 = <em>29.96 years</em> this is the time that has passed for Flo
this means that<em> Flo will be about 20 years younger than Malcolm when she returns</em>
<em></em>
relativistic distance is
d' = d x
d' = 3.78x x
d' = 3.78x x 0.6
d' = <em>2.268x</em><em> m</em> this is how far it is to Flo