a. The ball's horizontal and vertical positions at time 
are given by
The ball reaches the net when 
:
At this time, the ball is at an altitude of
which is 1.40 m - 0.900 m = 0.500 m above the net.
b. The change in angle gives the ball the new position functions
The ball reaches the net at time such that
at which point the ball's vertical position would be
so that the ball does not clear the net with 0.343 m - 0.900 m = -0.557 m.
Answer:
2
Explanation:
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Answers are:
1. Exothermic
2. Endothermic
3. Pendulum
4. Bob
5. Period
6. Conservation of energy
7. Potential energy
8. Kinetic energy
9. Chemical energy
10. Nuclear energy
Answer:
<em>The correct choice is D. Its gravitational potential energy must increase</em>
Explanation:
<u>Conservation of Mechanical Energy</u>
The total amount of mechanical energy, in a closed system in the absence of dissipative forces like friction or air resistance, remains constant.
This means that energy cannot disappear or appear and that potential energy can become kinetic energy or vice versa.
In a closed system like a pendulum, two types of energies are considered: Gravitational potential (U) and kinetic (K). Thus, the sum of both energies must remain constant in time.
Suppose the pendulum is at a state where U=150 J, and K=350 J. The total mechanical energy is:
M = 150 J + 350 J = 500 J
If the kinetic energy decreases to a new value, say K = 200 J, then the gravitational potential must increase to compensate for this new condition, that is: U = 300 J
The correct choice is D. Its gravitational potential energy must increase
Answer:
Answer: We should be aware of human rights violation happening in our community. In our community, there are so many people who cannot practice their own religion and rituals. ... In many nations around the globe, domestic violence is another disadvantage in our society and another example of "human rights violations".
Explanation:
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