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26 terms

Physical Science Chapter 3

Newtons laws 2 and 3, also opposing forces
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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?