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# Physics

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Cards in this guide (20)
Newtons first law of motion states

Newtons first law of motion states that an object in motion will stay in motion and an object at rest will say at rest.

What kind of friction occurs as a fish swims through water

fluid friction.

The acceleration due to gravity on the surface of mars is about one third the acceleration due to gravity on earth's surface the weight of a space probe on the surface of mars is about

One third its weight on earth's surface

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.

A box with a force of 60 N to the right and with a force of 70 N to the right If the force of sliding friction on the box is 120 N what is the net force on the box

the difference is 10

because 60

+ 70

130

- 120

10= friction

If a bat hits a ball with 1000 n of force how much force does the ball hit back on the bat

1000 N as well.

A ball is rolled uphill a distance of 3 meters before it slows stops and begins to roll back the ball rolls downhill 6 meters before coming to a rest against a tree what is the magnitude of the balls

The magnitude of the balls displacement is 9 meters.

How does a projectile differ from an object in free fall

A projectile has an initial forward velocity.

What is the term for the force exerted on an object by another object

reaction

What effect does an unbalanced force have on an object

An unbalanced force can completely destroy the object (depending upon its mass and power of force) or can gradually move it or it can also have no effect on the object.

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.

What is the acceleration of a 30.0-kg go-kart if the thrust of its engine is 300.0N

what is the acceleration of a 30.0-kg go kart if the thrust of its engine is 300.0 N?

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 describes the effects of forces on an object

Isaac Newton defines force as mass times acceleration.

Why the impact doesnt equally damage the car and the bug

There is little mass to the bug compared to an automobile.

How is the mass and the weight of an object related

The weight = mass x 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.

A small engine causes a 0.30 kg model airplane to accelerate at a rate of 11ms2 What is the net force on a model airplane

3.3kg ms/^2

0.3kg * 11 m/s^2 = 3.3kg ms/^2

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