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# Physics

Jude Beatty

Lvl 10
2021-10-15 18:35:35
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Cards in this guide (25)
Example of newtons second law of motion

newton second law of motion

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

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

When your mass increases what happens to your weight

If your mass increases, your weight also increases.

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 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 direction is the net force on a falling skydiver before she reaches terminal velocity

down

Which factor determines how fast a butterfly is moving

its size.

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 produced when a base reacts with water

It produces hydroxide ions - Jon

Which is a characteristic of projectile motion

It has variable acceleration

How does an open parachute increase the air resistance of a falling skydiver

by increasing surface area

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 the impact doesnt equally damage the car and the bug

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

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.

Express the hydroxide and hydronium ion concentrations in pure water at 25C

[H3O+] = 1x10^-7 M = hydronium ion concentration
[OH-] = 1x10^-7 M = hydroxide ion concnetration

Does water act as an acid or a base when it reacts with a base

Water is neither an acid nor a base, and water does not "react" with a base. It may dissolve it.

The Ionization of pure water forms

Hydronium and hydroxide ions

A tow truck exerts a net horizontal force of 1050 N on a 760-kg car. What is the acceleration of the car during this time

You need to apply Newton's Second Law, which in this case simply means, divide the force by the mass. The answer will be in meters per second squared.

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