Force and Mass
Acceleration is _________ ____________ to mass.
What is inversely proportional?
The equation for acceleration given based on Newton's Second Law.
What is a = F/m?
What are the kinds of material involved and how much the surfaces are pressed together?
The definition (and units) of pressure.
What is force per unit of area in Newtons per square meter or pascals?
The mass of a box of plastic foam which, when 10.0 N of net force is applied, accelerates at 2.0 meters per second squared.
What is 5.0 kg?
Acceleration is ________ ____________ to force.
What is directly proportional?
The acceleration of a 2000-kg, single-engine airplane as it begins its takeoff with an engine thrust of 500 N.
What is 0.25 meters per second squared?
Standard units for the force of friction.
What are Newtons?
The equation for pressure.
What is P = F/A?
The force on a 70-kg person decelerating at 30g (where g is the acceleration due to gravity).
What is 21,000 N? The occupant of a car can survive a crash if the deceleration during a crash is less than 30g, which for this person means a force less than 21,000 N.
As the mass of an object doubles, the acceleration _________.
What is "is cut in half?"
The units of force.
What are Newtons?
Matter besides solid objects that affects friction.
What are fluids/liquids/gases?
Why a sharp knife will cut better than a dull knife.
The acceleration on a 4-kg cart produced by the same net force which accelerates a 2-kg cart at 3 meters per second squared.
What is 1.5 meters per second squared?
The difference between proportionality and equality.
What is proportionality as two quantities increasing or decreasing by the same factor and equality as two quantities being exactly the same?
What is 21.6 N?
The air resistance on a 10-N sack that falls in air at constant velocity.
What is 10 N?
The position in which a person produces more pressure on the ground (between standing or lying down).
What is standing up?
The force of the brakes acting on a 2000-kg truck when the truck is traveling at 22 meters per second and stops in 4.0 seconds.
What is +/- 11,000 N?
Why Sherry is wrong when she claims that if an object has no acceleration, then no forces are acting on it?
What is the difference between individual force and net force?
What is kilogram-meters per second squared?
The force of friction which allows the velocity of a book to increase when it is pushed with a force of 10 N across a table.
What is less than 10 N?
The pressure on a table when a 20-N book with a 0.05-square-meter cover lies flat on it.
The acceleration that a truck which loses one-fourth of its original mass can achieve if it accelerates at 1 meter per second squared.