Physics Final Review Day 2

• 0.6 N

• 1.6 N

• 1,500 N

• 15,000 N

• 108 newtons.

• 0.25 newtons.

• 4 newtons.

• 36 newtons.

A book rests on a table. The force of gravity pulls down on the book with a force of 18 newtons. What prevents the book from accelerating downward at 9.8 m/s2?

• The table presses back up on the book with an equal and opposite force of 18 newtons.

• The table presses back up on the book with a force greater than 18 newtons.

• The inertia of the book holds it up.

Even though every action force has an equal but opposite reaction force, they do not cancel one another and motion may still occur because the:

• action and reaction forces are applied to the same object.
• action and reaction forces are applied to different objects.
• two forces have different magnitudes.
• two forces have equal magnitudes.

What is the momentum of a 0.12-kilogram baseball moving at 20 m/s?

• 0.006 kg·m/s

• 2.4 kg·m/s

• 166.7 kg·m/s

• 0.29 kg·m/s

The equation to calculate momentum is:

If you go three times as fast, your kinetic energy becomes:

• 3 times smaller.

• 9 times smaller.

• 3 times bigger.

• 9 times bigger.

Batteries are devices that change chemical energy to ____ energy.

• mechanical
• radiant
• electrical
• nuclear

Energy can be thought of as stored ____.

• Force
• Mass
• Weight
• Work

Kinetic energy increases with:

• mass and distance.
• mass and speed.
• speed and distance.
• speed and time.