A particle is fired vertically upward fom earth's surface and it goes up to a maximum height of 6400 km. find the initial speed of particle.
Answers
The initial speed of particle = 354.35 m/s
Given:
A particle is fired vertically upward from earth's surface and it goes up to a maximum height of 6400 km.
To find:
The initial speed of particle.
Formula used:
v² -u²=2as
Where, v= final velocity.
u = initial velocity.
a = acceleration due to gravity.
s = maximum distance.
Explanation:
6400 km is very very height so we can consider it as 6400 meter
S = maximum height of 6400 m.
After attending maximum height the velocity becomes zero.
v= final velocity = o m/s
a =acceleration due to gravity = 9.81 m/s
The work is done oposite to the gravity so a is negative
v² -u²=2as
-u² = 2×(-9.81) × 6400
u = 354.35 m/s
The initial speed of particle = 354.35 m/s
To learn more...
1)A body of mass 0.5 kg falling freely under the gravity takes 5 seconds to reach the ground.find the kinetic energy and potential energy of the body when the body has travelled for 4 seconds.
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