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Physics

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Ladarius Brekke

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Cards in this guide (11)
What is the product of an objects mass and velocity

That's the object's "momentum".

What is the momentum of a 50-kilogram ice skater gliding across the ice at a speed of 5 ms

250 kg * m/s

The density of a submerged submarine is about the same as the density of

The dnsity of a submerged submarine is the same as the density of the water if the density of the submarine was grater it will sink, if the density was less it would float.

When your mass increases what happens to your weight

If your mass increases, your weight also increases.

What is the net force acting on a falling object when it reaches terminal velocity

An object falling at terminal velocity is moving at constant speed (that's what terminal velocity means) and we will assume it is not changing direction (i.e. it is falling straight down; in reality it is more likely to be bobbing and weaving on the wind.) Constant speed and direction is another way of saying constant velocity. when an object is acted upon by a net force, it's velocity changes. So, since we know that the velocity is not changing, there is no force.

Which factor determines how fast a butterfly is moving

its size.

Which describes a force acting on an object

a ball that moves when kicked

Which is a characteristic of projectile motion

It has variable acceleration

What is a cars acceleration if it increases its speed from 5 m s to 20 m s in 3 s

It accelerates at a speed of 5m/s

What describes the effects of forces on an object

Isaac Newton defines force as mass times acceleration.

Why does an object have a different weight on the moon than it does on Earth

the earth and moon have different values for the acceleration due to gravity.

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