3 years ago

Internal diameter of a test tube

Physics

1 answer:

sladkih [1.3K]3 years ago

4 0

Answer:

16 mm with 14 mm inside diameter.

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A crane with output power of 200W will lift a 600N object a vertical distance of 4.0 meters in seconds

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In serving, a tennis player accelerates a 59 g tennis ball horizontally from rest to a speed of 34 m/s Assuming that the acceler

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Answer:

The magnitude of the force exerted on the ball by the racquet is 94.73 N.

Explanation:

The force exerted on the ball is the following:

$F = ma$

Where:

m: is the mass of the ball = 59 g

a: is the acceleration

The acceleration of the ball can be found with the following kinematic equation:

$v_{f}^{2} = v_{0}^{2} + 2ad$

Where:

d: is the distance = 0.36 m

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$v_{0}$ : is the initial speed = 0 (it start from rest)

Hence, the acceleration is:

$a = \frac{v_{f}^{2}}{2d} = \frac{(34 m/s)^{2}}{2*0.36 m} = 1605.6 m/s^{2$

Finally, the force is:

$F = ma = 59 \cdot 10^{-3} kg*1605.6 m/s^{2} = 94.73 N$

Therefore, the magnitude of the force exerted on the ball by the racquet is 94.73 N.

I hope it helps you!

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Internal diameter of a test tube​

Internal diameter of a test tube