An egg is drown at a wall and breaks. A second egg is thrown at the same velocity and collides with a bed sheet. The egg does no
1 answer:
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Answer:
The angular velocity, clockwise
Explanation:
The mass of the man, m = 72 kg
The center of mass of the man will be at the middle of his body, particularly around his abdomen.
Height of the center of mass, h = 0.71 m
The speed of the man, v₁ = 1.35 m/s
Moment of inertia about the ankle joint, I = 66 kg/m²
Based on the principle of conservation of angular momentum (about the ankle joint):
Angular momentum before impact = Angular momentum after impact
Angular momentum before impact = -mv₁h
Angular momentum before impact = -(72 * 1.35 * 0.71)
Angular momentum before impact = -69.012 kg m²/s...............(1)
Angular momentum after impact =
Angular momentum after impact = .................(2)
The angular velocity, clockwise
Given that,
A ball is thrown upward. At a height of 10 meters above the ground, the ball has a potential energy of 50 Joules. It is moving upward with a kinetic energy of 50 Joules.
We need to find the maximum height h reached by the ball. Let at a height of 10 meters, it has a potential energy of 50 Joules. So,
........(1)
Let at a height of h m, it reaches to a maximum height. at this point, it has a total of 100 J of energy. So,
So, the correct option is (E) "h = 20 m".