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For a top player, a tennis ball may leave the racket on the serve with a speed of 55 m/s (about 120 mi/h). If the ball has a mass of 0.060 kg and is in contact with the racket for about 4 ms (4 x 10-3 s), estimate the average force on the ball. Would this force be large enough to lift a 60-kg person?

Respuesta :

cjmejiab

Answer:

Yes is large enough

Explanation:

We need to apply the second Newton's Law to find the solution.

We know that,

[tex]F= ma[/tex]

And we know as well that

[tex]a= \frac{v}{t}[/tex]

Replacing the aceleration value in the equation force we have,

[tex]F= \frac{mv}{t}[/tex]

Substituting our values we have,

[tex]F= \frac{(0.060)(55)}{4*10^{-3}}[/tex]

[tex]F=825N[/tex]

The weight of the person is then,

[tex]W = mg[/tex]

[tex]W = (60)(9.8) = 558N[/tex]

We can conclude that force on the ball is large to lift the ball

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