How does the mass of an object affect its inertia?
1 answer:
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Answer:
(a) 62.5 m
(b) 7.14 s
Explanation:
initial speed, u = 35 m/s
g = 9.8 m/s^2
(a) Let the rocket raises upto height h and at maximum height the speed is zero.
Use third equation of motion
h = 62.5 m
Thus, the rocket goes upto a height of 62.5 m.
(b) Let the rocket takes time t to reach to maximum height.
By use of first equation of motion
v = u + at
0 = 35 - 9.8 t
t = 3.57 s
The total time spent by the rocket in air = 2 t = 2 x 3.57 = 7.14 second.
The new rotational energy of the system(RE) =
How this is calculated?
- Distance of each astronaut from centre of mass(m)=d/2
- Moment of inertia of system
- Speed of astronauts=v
- So, angular speed,ω =
=
- Rotational energy of system=
where, ω= angular speed
What is rotational energy?
- Rotational energy or angular kinetic energy is kinetic energy due to the rotation of an object and is part of its total kinetic energy.
- Looking at rotational energy separately around an object's axis of rotation, the following dependence on the object's moment of inertia is observed
To know more about rotational energy , refer:
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