Physics Midterm 2

A rock is thrown vertically into the air. At the very top of its trajectory, the net force on the rock is __________________ which is the __________________________ its weight. ITs acceleration at the very top of its path is ___________ m/s/s

When an object falls through the air, as velocity increases, acceleration __________

An object reaches terminal velocity when

T or F. The mass of an object changes depending on where it is located

T or F. The weight of an object changes depending on where it is located

T or F An iron bar has more mass than a feather pillow

T or F. An iron bar has more inertia than a feather pillow

T or F. An object set in motion, neglecting air resistance and friction, must have a force applied to it to remain in motion.

T or F. Mass is not a force

T or F. A car is moving at a constant velocity. A rock is dropped from the midpoint of the ceiling and strikes the floor below. The rock hits the floor ahead of the midpoint of the ceiling.

T or F. Your weight is a measure of your volume

T or F. At the Earth's surface, 1 kg of any material weighs 9.8 N

This chapter has bee on Isaac Newton's __________ Law of motion, also called the Law of ___________.

To find force given mass and acceleration, you find force by using the formula

To find mass given force and accleration, you find mass by using the formula

To find acceleration given force and mass, you find acceleratoin by using the formula

Acceleration and force are _______________ proportional.

Acceleration and mass are _____________ proportional.

Acceleration means ________________.

Does constant things acclerate?

Zero net force means __________ _______________.

Weight is a ______________.

Objects falling through the air experience _________ _____________.

As velocity ____________________, air resistance also _____________________, and acceleration _______________

At terminal velocity, acceleration is __________

A force is a vector quantity because it has both ___________ and ________________________

If a net force is doubled, what happens to the acceleration

Force and acceleration are ______________ proportional

If the mass of an object were to become twice as much, what would happend to acceleration?

Mass and acceleration are ___________ proportional.

What is the net force on an object being pulled 20 N. northward and 15 N southward?

What is the net force on an object at rest?

A car has a mass of 2000 kg and accelerates at 4 m/s/s. What is the force exerted on the car?

Constant mass acted on by constant force produces constant _____________

10 kg = __________ Newtons

1 N = _____________ kilograms

T or F. Neglecting friction, a large block of ice and a smal block of ice sliding down an incline together will arrive at the bottom at the same time.

A jumbo jet has a mass of 160,000 kg. The thrust for each of four engines is 80,000 N. What is the jet's acceleration in meters per second per second when taking off?

T or F. A 1-kg ball is thrown at 10 m/s straight upward. Neglecting air resistance, the net force that acts on the stone when it is half way to the top of its path is 10 N.

An object released from rest on another planet requires one second to fall a distance of 5 meters. What is the acceleration in meters per second per second due to gravity on this planet?

A block is dragged without acceleration in a straight line path across a level surface by a force of 8 N. What is the force of friction between the block and the surface?

What is acceleration of an object that has reached its terminal velocity?

T or F. Accounting for air resistance, a heavier object will fall more slowly than a lighter object.

T or F. A heavier object experiences more force from air resistance.

A ball is thrown vertically into the air. Because of air resistance, its speed when it returns to its starting level compared to its initial speed is

When an object falls through the air, as velocityincreases, accleration ___________________