Physics Connections & Test Tips

What is the formula for force?

Force equals mass times acceleration.

What physics fundamentals should you review for this test?

Force, action and reaction, equilibrium, pressure, the kinds of force, work and energy.

Name five kinds of force listed in the guide.

Friction, gravity, magnetism, recoil and static electricity.

What does PSI stand for?

Pounds per square inch — a measure of pressure.

What happens to a crane's center of gravity when its reach is extended?

The center of gravity shifts.

What is this test actually measuring?

How well you comprehend the fundamentals of mechanical principles, not how much physics you have memorized.

What is the maximum force ever needed to move an object?

No more than the weight of the object, not counting resistance from friction.

When choosing between answers, what should you narrow down to?

The answers that are mechanical — a non-mechanical explanation is most likely wrong.

What does a change in a mechanical operation usually involve?

Both a plus and a minus — an increase paired with a decrease, or a gain paired with a loss.

If a question asks what happens when x changes, what does the right answer usually look like?

One that names both a positive and a negative effect.

Do all Mechanical Comprehension questions require formulas?

No — many can be solved in your head, but some do require calculation.