Semester 1 Final Review #2

Front

How does a movable pulley make lifting objects easier?

Back

The amount of force needed is reduced.

Front

What is the total force when two forces of 6N and 12N are acting in the same direction?

Back

18N

Front

Why does a compass always point north?

Back

The needle is a magnet and it aligns itself with the Earth's magnetic fields.

Front

What is the fulcrum of a seesaw?

Back

The middle.

Front

What is the net force when two equal forces of 17N are acting in opposite directions?

Back

0N.

Front

What is a pulley?

Back

A simple machine that uses a wheel and a rope to lift objects.

Front

Define force.

Back

A push or pull on an object that can cause it to move or change its motion.

Front

What is the principle of moments?

Back

For an object to be in equilibrium, the sum of clockwise moments about a point must equal the sum of counterclockwise moments.

Front

What is gravitational force?

Back

The force of attraction between two masses.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.