What is the kinetic energy of a 26 kg eagle flying at an altitude of 65 m at a speed of 19 m/s?
1 answer:
Answer:
4693 J
Explanation:
The kinetic energy of the eagle is given by:
where
m is the mass of the eagle
v is the speed of the eagle
In this problem, m = 26 kg and v = 19 m/s. Substituting into the formula, we find
As we can see, the altitude of the eagle is not relevant for the calculation of the kinetic energy.
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Answer:
Force,
Explanation:
Given that,
Mass of the bullet, m = 4.79 g = 0.00479 kg
Initial speed of the bullet, u = 642.3 m/s
Distance, d = 4.35 cm = 0.0435 m
To find,
The magnitude of force required to stop the bullet.
Solution,
The work energy theorem states that the work done is equal to the change in its kinetic energy. Its expression is given by :
Finally, it stops, v = 0
F = -22713.92 N
So, the magnitude of the force that stops the bullet is