NCFE Physical Science Practice

Front

What is displacement?

Back

Displacement is the shortest distance from the initial to the final position of an object, along with the direction.

Front

If Bob walks 2 blocks east, 4 blocks south, and 2 blocks west, what is his displacement?

Back

4 blocks south.

Front

What is the difference between distance and displacement?

Back

Distance is the total path length traveled, while displacement is the straight-line distance from the starting point to the endpoint.

Front

What is the chemical formula for magnesium phosphate?

Back

Mg₃(PO₄)₂.

Front

What is a metalloid?

Back

Metalloids are elements that have properties of both metals and nonmetals.

Front

Which element is considered a metalloid?

Back

Antimony.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What happens to the total mechanical energy of an object in free fall, neglecting air resistance?

Back

The total mechanical energy remains constant.

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or configuration, often related to height in a gravitational field.

Front

How do you calculate the total distance traveled?

Back

Total distance is the sum of all distances covered, regardless of direction.