a cats purple crinkle ball toy of mass 20g is throwwn straight up in the air with an initial speed of 4m/s. assume in this problem that air grad is negligible. what is the kinetic energy of the ball as it leaves the hand?

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21-10-2022
Physics

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a cats purple crinkle ball toy of mass 20g is throwwn straight up in the air with an initial speed of 4m/s. assume in this problem that air grad is negligible. what is the kinetic energy of the ball as it leaves the hand?

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QWTiffany QWTiffany · Answer 1 · 2022-10-26T14:55:47-04:00

When the ball leaves the hand, it's kinetic energy is 160 Joules.

The kinetic energy of object is due to its virtue of motion. So, as the ball leaves the hand, it is in motion. The formula representing kinetic energy is: K.E. = 1/2×m×v², where K.E. is kinetic energy, m is mass and v is velocity.

Keep the values in formula to find the kinetic energy of the ball.

K.E. = 1/2×20×4²

Taking square on Right Hand Side of the equation

K.E. = 1/2×20×16

Performing multiplication and division on Right Hand Side of the equation

K.E. = 160 Joules

Thus, kinetic energy of ball is 160 Joules.

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