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Morgarella [4.7K]
3 years ago
15

A ball of mass of 0.5kg is dropped from a height of 2m.

Physics
1 answer:
erastovalidia [21]3 years ago
3 0

Answer:

6.3m/s

Explanation:

Given parameters:

Mass of the ball  = 0.5kg

Height  = 2m

Unknown:

Velocity when the ball hits the ground  = ?

Solution:

Since the potential  energy is transformed into kinetic energy;

            P.E  = K.E

              mgh  = \frac{1}{2} m v²

     cancelling m;

               gh  =  \frac{1}{2} v²

                v² = 2gh

                v  = √2gh

Insert the parameters and solve;

               v  = √2gh  = √ 2 x 9.8 x 2  = 6.3m/s

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