A girl whose weight is 200-N hangs from a bar supprted by two strands of rope. What is the tension in each strand?
What is 100-N.
100
The acceleration produced by a net force on an object is
What is directly proportional to the net force?
100
Which of the following would exert the most pressure on the ground?
(running shoe, high heel shoe, skis)
What is high heel shoe?
100
Anything that flows; in particular a liquid or gas.
What is a fluid?
200
The speed of an object dropped in air will continue to increase without limit unit it strikes the ground.
What is false? (terminal speed or velocity)
200
As he falls from a high-flying stationary helicopter, bronco's velocity increases and his acceleration
What is decreases?
200
If the force acting on a cart doubles, what happens to the cart's acceleration?
What is it doubles?
200
Pressure is defined as
What is force per unit area?
200
When two values change in opposite directions, so that if one is doubled the other is reduce to on half.
What is inversely proportional?
300
The acceleration of an object is inversely proportional to the net force acting on it.
What is false? (directly proportional)
300
A tennis ball and a solid steel ball the same size are dropped at the same time. Which ball has the greater focre acting on it?
What is the steel ball? (air drag)
300
The force of gravity is twice as great on a 2 kg rock as on a 1 kg rock. Why does the 2 kg rock not fall with twice the acceleration?
What is twice the force acts on twice the mass?
300
The formula for pressure.
What is pressure = force/area?
300
The acceleration produced by a net force on a body is directly proportional to the magnitude of the net force.
What is Newton's second law? (Force = mass x acceleration)
400
Air resistance is caused by the friction between the air and an object moving throught the air.
What is true?
400
A tennis ball and a solid steel ball the same size are dropped at the same time. In the absence of air resistance, which ball has the greater accelertaion?
What is they both have the same acceleration?
400
How much air resistance acts on a 100-N bag of nails that falls at its terminal speed?
What is 100-N?
400
The SI unit for pressure.
What is the Pascal?
400
If a person pulls a crate across the florr with a force of 500-N and it accelerates to the right, the force of friction is...
What is less that 500-N to the left?
500
Pressure is defined as the force one object exerts on another object.
What is false? (force per unit area)
500
When a skydvier has reached terminal speed, what is the air resistance equal to?
What is air resistance equals weight? (air drag up equals force of gravity down)
500
Calculate the acceleration of a 2000kg single-engine airplane just before takeoff when the force of the engine exerts a thrust of 500-N.
What is .25 m/s^2?
500
Why does a sharp knife cut more easily when compared to a dull knife?
What is pressure is greated with the lower area of the sharp knife?
500
A crate of junk food rests on a horizontal floor. The only forces acting on it are wieght and normal force. The weight is ____ the normal force.