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3 years ago

A crane raises a crate with a mass of 150 kg to a height of 20 m. Given that

Physics

1 answer:

MA_775_DIABLO [31]3 years ago

3 0

Answer:

P.E=29400J

Explanation:

m=150Kg h=20m g=9.8ms⁻²

P.E=mgh

P.E=150×9.8×20

P.E=29400J

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A soccer ball kicked with a force of 12.5 N accelerates at 6.2 m/s’ to the right. What is the mass of the ball? Answer in units

stepladder [879]

Answer:

m = 2.01[kg]

Explanation:

This problem can be solved using Newton's second law which tells us that the force applied on a body is equal to the product of mass by acceleration.

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Which statement best describes the movement of energy?

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Energy flows from high to low.

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how does a particle differ from its anti-particle? it has opposite mass. it has opposite charge. its wave-function is the opposi

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An antiparticle is a subatomic particle that, by definition, has the same mass as its normal particle counterpart but the opposite magnetic moment and electric charge. An electron's antiparticle, for instance, is the positron.

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1 year ago

a 0.15 kg baseball has a momentum of 0.78 kg*m/s just before it lands on the ground. What was the ball's speed just before landi

vovangra [49]

5.2m/s

Explanation:

Given parameters:

Mass of baseball = 0.15kg

Momentum of baseball = 0.78kgm/s

Unknown:

Speed of baseball = ?

Solution:

The momentum of the baseball is a function of the product of the mass and velocity. It is a vector quantity:

Momentum = mass x velocity

Since the speed of the ball is unknown:

Velocity = $\frac{momentum }{mass}$

= $\frac{0.78}{0.15}$

= 5.2m/s

The speed of the baseball before it lands is 5.2m/s

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3 years ago