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2 years ago

Ana kicks a stationary 0.2kg soccer ball. The ball leaves her foot at a speed of 20 m/s.

Physics

1 answer:

elena55 [62]2 years ago

6 0

Answer:a. 24 kg m/s

b. 3/5s

Explanation:

a.impulse is the change in momentum so at first the momentum is zero because the ball was at rest and the final momentum is 1.2kg*20m/s=24 kg m/s

so the impulse would be (24-0) kg m/s=24 kg m/s

b. so the impulse equation is impulse is force *delts time

so 24 kg m/s=40N*t

t=24 kg m/s /40N=3/5 s

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De Broglie's identity gives the relationship between the momentum and the wavelength of a particle:
$p=mv= \frac{h}{\lambda}$
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m is its mass
v its velocity
h is the Planck constant
$\lambda$ is the wavelength

By re-arranging the equation, we get
$\lambda= \frac{h}{mv}$
and by using the data about the proton, given in the text, we can find the proton's wavelength:
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2 years ago

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Velocity = 162.12 m/s

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We are given;

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Time; t = 27.3 days = 27.3 × 86400 s = 2358720 s

Now, formula for velocity is;

Velocity = distance/time

Thus;

I) velocity = 382400000/2358720

Velocity = 162.12 m/s

II) Acceleration is centripetal acceleration and is given by the formula;

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2 years ago

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Explanation:

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Therefore, "the charge cannot be created or destroyed" describes the principle of the conservation of charge.

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The loaded cab of an elevator has a mass of 3.0 x 10 3 kg and moves 200 m up the shaft in 20 s at constant speed. At what averag

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The average rate at which the cable does work is 294,000 J/s.

The given parameters:

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