A student drops a rubber ball onto a surface. Assume that this is a closed system. The ball bounces, but each successive bounce
is shorter than the one before it. Eventually, the ball comes to a stop. Which statement provides evidence that supports the idea that energy is conserved in this closed system?
A. The ball moves through air, suggesting that the ball has mechanical energy.
B. The ball needs a push or pull to start moving, suggesting it needs a constant input of energy.
C. The ball makes a sound with each bounce, suggesting that some kinetic energy transformed into sound.
D. The ball bounces many times, suggesting the energy is used up efficiently
A. The ball moves through air, suggesting that the ball has mechanical energy.
B. The ball needs a push or pull to start moving, suggesting it needs a constant input of energy.
C. The ball makes a sound with each bounce, suggesting that some kinetic energy transformed into sound.
D. The ball bounces many times, suggesting the energy is used up efficiently
2 answers:
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Answer:
Potential energy = 14.7 Joules.
Explanation:
Given the following data;
Mass, m = 1kg
Height, h = 1.5m
We know that acceleration due to gravity is equal to 9.8m/s²
Potential energy can be defined as an energy possessed by an object or body due to its position.
Mathematically, potential energy is given by the formula;
Where, P.E represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
Substituting into the equation, we have;
P.E = 14.7 Joules.