Physical Science Midterm 2024 Review

Work is done on an object only when:

• A force is exerted, and the object moves.

• The object is stationary.

• A force is exerted but no movement occurs.

• A constant velocity is maintained.

If you apply a force of 50 N to move an object 3 meters, how much work is done?

• 150 J

• 300 J

• 50 J

• 15 J

Tags

NGSS.HS-PS3-2

What unit is used to measure power?

• Joule

• Watt

• Newton

• Kilogram

Which example demonstrates the most work being done?

• Pushing a wall with all your strength

• Pulling a cart for 5 meters

• Holding a weight steady for 10 seconds

• Walking at a constant speed on a flat surface

What is the dependent variable in an experiment?

• The variable you change.

• The variable you measure.

• The variable that stays constant.

• None of the above.

A car traveling at 20 m/s increases its speed to 60 m/s in 8 seconds. What is the acceleration?

• 5 m/s²

• 4 m/s²

• 8 m/s²

• 10 m/s²

Tags

NGSS.HS-PS2-1

Which of the following is a vector quantity?

• Distance

• Speed

• Velocity

• Time

An object in free fall experiences:

• Increasing acceleration.

• Constant velocity.

• Constant acceleration.

• Decreasing velocity.

Tags

NGSS.HS-PS2-1

Which of the following best describes the difference between speed and velocity?

• Speed has direction, but velocity does not.

• Velocity has magnitude only.

• Speed is a scalar quantity, and velocity is a vector quantity.

• Velocity is always larger than speed.

A car travels 200 km in 4 hours. What is its speed?

• 20 km/hr

• 30 km/hr

• 50 km/hr

• 40 km/hr