An alpha particle enters a hollow tube of 4 m length with an initial speed of 1 km / s. It is accelerated in the tube and comes out of it with a speed of 9 km/s. The time for which it remains inside the tube is : Pls answer it fast with explanation.
Answers
Answered by
10
EXPLANATION.
- GIVEN
an alpha particles enter a hollow tube of 4 m
length.
initial speed = 1 km/s.
it is accelerated in the tube and comes out of it
with a speed of 9 km/s.
Find the time for which it remains inside
the tube is.
According to the question,
Initial speed = u = 1 km/s = 1000 m/s
Final speed = v = 9 km/s = 9000 m/s
From Newton third equation of
kinematics.
=> v^2 = u^2 + 2as
=> ( 9000 )^2 = ( 1000 )^2 + 2 X a X 4
=> a = 10^7 m/s^2
From Newton first equation of
kinematics.
=> v = u + at
=> t = v - u / a
=> t = 9000 - 1000 / 10^7
=> t = 8 X 10^-4 seconds.
Therefore,
Time for which it remain inside
The tube = 8 X 10^-4 seconds.
Similar questions