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sandlobster3129
18.05.2021 •
Physics
When Galileo looked at the Moon through a telescope, he could see its surface is rough, with mountains, valleys, and craters. In the then-ongoing debate between heliocentrism and geocentrism, what was the significance of this discovery
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Ответ:
23m/s
Explanation:
Given that:
Mass of soccer ball = 0.450kg
kinetic energy = 119 J
velocity of the soccer ball = ?
Kinetic energy is the energy possessed by a moving object. It is measured in joules, and depends on the mass (m) of the object and the velocity (v) by which it moves
i.e K.E = 1/2mv^2
119J = 1/2 x 0.450kg x v^2
119J = 0.225kg x v^2
v^2 = 119J / 0.225kg
v^2 = 528.9
To get the value of velocity, find the square root of v
v = √528.9
v = 22.997m/s (Round result to 23)
Thus, the velocity of the soccer ball is 23m/s