EOY Review 1st Semester

Front

A boy gets an electric train set for Christmas. He lets the engine run without any other train cars attached and notices how fast it takes off. He stops the engine and then attaches the cargo carts to it. What observation is he likely to make?

Back

The acceleration of the engine will be lower than before.

Front

In a collision between two objects in an isolated system, what is always true?

Back

The total momentum of the system is always conserved.

Front

Which property of two moving objects set to collide most affects the magnitudes of their momentum?

Back

Mass

Front

What is the electromagnetic spectrum?

Back

It is a range containing all of the possible frequencies and wavelengths of electromagnetic radiation.

Front

Which property has the greatest effect on the rate of acceleration for an object falling near the surface of Earth?

Back

Gravitational field strength

Front

An object that is traveling east at a constant rate has –

Back

speed and velocity, but no acceleration.

Front

Which box will require the most force to move? Options: 9.0 kg, 14.0 kg, 20.0 kg, 24.0 kg

Back

24.0 kg

Front

Football helmets have a hard outer shell lined with a thick layer of plastic foam inside the shell. What is the primary purpose of the foam lining?

Back

Pockets of air in the foam absorb energy during a collision and reduce forces on the head.

Front

The energy level of an electron is most closely related to its —

Back

position

Front

Which section on the graph above shows the object sitting still for ten minutes?

Back

Section B