What is the object doing between 3 and 5 seconds?

A dog runs with an initial speed of 7.5 m/s on a waxed floor. It slides to a stop in 15 seconds. What is the acceleration?

Which law of motion is explained by the equation:

Force = Mass x Acceleration (F=ma)?

Which two forces are the only forces that can both attract and repel?

A hiker pushed on a large rock, but it did not move. He pushed 300 N to the left. How much force does he feel from the rock?

The SI unit for electric current is the

How much work is done when a crate is pushed with 50 N of force for a distance of 15m?

A student rows a boat across a still pond, doing 3600 J of work on the oars in 60 seconds. What is the student's power output? (Power=Work/Time)

Because there is always some _____________, the efficiency of any machine is always less than 100%.

In which situation is work not done?

What is the SI unit of pressure?

Where is fluid pressure greatest in a swimming pool?

Which of the following materials is NOT a fluid?

Atmospheric pressure is caused by

As the speed of a fluid increases, the pressure within the fluid decreases.

What principle states that the buoyant force on an object is equal to the weight of the fluid displaced by the object?

Compared to the pressure exerted by a brick standing on its end, the pressure exerted by the same brick resting on its side is

A device that uses pressurized fluid acting on pistons of different sizes to increase force is a(n)

What is kinetic energy plus potential energy called?

 $KE\ =\ \frac{1}{2}mv^2$    If a 90 kilogram man is traveling at a speed of 2 m/s, what is his kinetic energy?

 $PE\ =\ mgh\ \ \ where\ g=9.8\ \frac{m}{s^2}$    A 10 kg jar of pickles is on a shelf 2.4 meters above the floor. What is the jar's potential energy?

Fission is a nuclear reaction in which

a source of energy that can be replaced in a relatively short period of time

a source of energy that exists in limited quantities and, once used, cannot be replaced except over the course of millions of years

Heat is the transfer of thermal energy from one object to another because of a difference in

 $Q\ =\ m\times c\times\Delta T$  
How many kilojoules of heat must be transferred to a 420-g aluminum pizza pan to raise its temperature from 22°C to 232°C? The specific heat of aluminum in this temperature range is 0.96 J/g•°C.

 $Q\ =\ m\times c\times\Delta T$  
As 315 g of hot milk cools in a mug, it transfers 31,000 J of heat to the environment. What is the temperature change of the milk? The specific heat of milk is 3.9 J/g•°C.

What property of an object is related to the average kinetic energy of the particles in that object?

What is the SI unit of electric charge?

Which of the following would reduce the resistance of a metal wire?

 $V=IR$  The current in a clothes iron measures 5.0 amps. The resistance of the iron is 24 ohms. What is the voltage?

 $V=IR$  The current in a lap measures 6.0 amps, and voltage of the is 12 V. What is the resistance?

The SI unit for electric potential is the

The SI unit for resistance is the