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3 years ago

What is the velocity of a 50kg skater if her momentum is 225kg. m/s?

2 answers:

8 0

|Momentum| = (mass) x (speed)

225 kg-m/s =(50kg) x (speed)

Divide each side by (50kg): Speed=(225 kg-m/s) / (50 kg) = 4.5 m/s .

Regarding the velocity, nothing can be said other than the speed, because
we have no information regarding the direction of the object's motion.

kondor19780726 [428]3 years ago

5 0

225/50=4.5
because if u look at the units, the kg will be cancelled out if u divide the momentum by mass, leaving you with m/s

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Answer:

The tank is losing $4.976*10^{-4} m^3/s$

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Explanation:

According to the Bernoulli’s equation:

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We are being informed that both the tank and the hole is being exposed to air :

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Also as the tank is voluminous ; we take the initial volume $v_1$ ≅ 0 ;

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$v_2 = \sqrt{[2*9.81*(20 - 15)]$

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$v_2= 9.9 \ m/s$ as it leaves the hole at the base.

radius r = d/2 = 4/2 = 2.0 mm

(a) From the law of continuity; its equation can be expressed as:

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How fast is the water from the hole moving just as it reaches the ground?

In order to determine that; we use the relation of the velocity from the equation of motion which says:

v² = u² + 2gh ₂

v² = 9.9² + 2×9.81×15

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The velocity of how fast the water from the hole is moving just as it reaches the ground is : $v_g = \sqrt{392.31}$

$v_g = 19.81 \ m/s$

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Answer:

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Explanation:

Given that,

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The change in velocity per unit time is equal to average acceleration of an object. It can be given by :

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