26 terms

Physical Science Chapter 3

Newtons laws 2 and 3, also opposing forces
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.
The path of a projectile is always: (what shape)
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:
As you get farther from the Earth your weight will:
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?
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:
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
Weight and type of surfaces affect:
534.5 N
If a person is 120 lbs what is their wight in N?