A 22 kg ball has 334 J of kinetic energy. How fast is the girl running
1 answer:
5.5m/s
Explanation:
Given parameters:
Mass of ball = 22kg
Kinetic energy = 334J
Unknown:
Velocity of the girl = ?
Solution:
Kinetic energy is the energy possessed by a moving body. It is the energy due to the motion of a body.
It is mathematically expressed as;
K.E =
Input the values;
334 = x 22 x v²
v² =
v² = 30.4
v = √30.4 = 5.5m/s
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Answer:
Explanation:
We want to find the initial speed of the ball.
To do this, we have to apply the formula for the time of flight of a projectile:
where θ = angle of flight
g = acceleration due to gravity
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Therefore, substituting the given values into the formula, we have that:
⇒ 2 × ×0.8910= 9.8 × 4.2
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That is the initial speed of the ball.
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