Air Resistance

The upward force on an object falling through the air.

Newton's Second Law

Explains the relationship between mass, force, and acceleration

Air Resistance

Why a feather falls slower than brick.

9.8 m/s^2

The acceleration of gravity on earth.

fall at the same rate

In the absence of air, a penny and a feather that are dropped from the same height at the same time will:

F = M x A

What is the equation that explains Newton's Second Law

Centripital Force

When an object moves in a circular path, what accelerates the object toward the center of the circle.

Curved

The path of a projectile is always: (what shape)

Acceleration

For any object, the greater the force applied to it the greater its ________ will be.

Mass and Distance

The size of the gravitational force between two objects depends on their:

decrease

As you get farther from the Earth your weight will:

action-reaction

When a force is exherted on a box, an equal and opposite force is exherted by the box. These forces are called _________ forces.

greater mass

Why does a real car have more momentum than a toy car moving at the same speed?

Momentum

What does the P stand for in the following equation? P = M x V

Newton's Third Law

the statement, "to every action there is an equal and opposite reaction" summarizes:

kg/ms (Joule)

The unit for measuring Momentum is a:

The Law of Conservation of Momentum

When two balls collide, the momentum after the collision can be explained by using:

12 m/s^2

The acceleration caused by a 300N force acting on a 25kg object

15 m/s^2

The acceleration caused by a 3,000N force acting on a 200kg object

Free Fall

An object that seems weightless on or near Earth is actually in:

Horizontally (in a straight line)

If gravity did not affect the path of a horizontally thrown ball, the ball would move:

Gravity

It's what makes mass and weight different.

50 kgm/s (joules)

The momentum of a 2kg mass at 25m/s

48 Newtons

What force is needed to accelrate 12kg 4m/s^2

friction

Weight and type of surfaces affect:

534.5 N

If a person is 120 lbs what is their wight in N?