If a track star runs down the runway in the high jump event faster, he will be able to jump to a greater height. This is explain
2 answers:
Answer:
Option D
Explanation:
The kinetic energy of a track star is given by the expression , where m is the mass of track star and v is the velocity of track star.
The potential energy is given by the expression mgh , where h is the height of track star and g is acceleration due to gravity value.
By energy conservation theory, energy can neither be created or destroyed.
So a running track stars kinetic energy is converted to potential energy when he jumps.
= mgh
h ∝
So height reached increases when velocity of speed star increases.
So the answer is the kinetic energy before the jump is converted to potential during the jump.
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Answer:
Angular speed,
Explanation:
It is given that,
The top of the leaning bell tower at Pisa, Italy, moved toward the south at an average rate of, v = 1.2 mm/yr
Velocity,
Height of the tower, h = 55 m
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So, the average angular speed of the tower’s top about its base is . Hence, this is the required solution.