2021 Physical Science Physics Final

What is the difference between a scalar and vector quantity

• Scalar Quantities shows magnitude only, where Vector Quantities show magnitude and direction.

• Vector Quantities shows magnitude only, where Scalar Quantities show magnitude and direction.

• Scalar and Vector Quantities are the same thing.

Jerry walked from home to school, then from the school to the park. What is his total distance and displacement?

• Distance= 8km, Displacement=2km

• Distance= 2km, Displacement=8km

• Distance= 5km, Displacement=3km

• Distance= 3km, Displacement=5km

What is the average speed (in m/s) of a sprinter who does the 100 m dash in 25 s?

Speed= Distance/Time

• 4 m/s

• 40 m/s

• 2.5 m/s

• 0.25 m/s

A car has completed 1.5 laps on this 3km track in 10 seconds. The track is 5km wide. What is the average velocity in km/s.

Velocity= Displacement/Time

• 0.5 km/s

• 5 km/s

• 0.45 km/s

• 4.5 km/s

Which of the following is NOT a way to change acceleration?

• Keeping constant speed

• Increasing speed

• Decreasing speed

• Changing direction

Which of the following is incorrectly matched.

• Sliding Friction- a plane driving down the runway

• Static Friction- a book resting on a desk

• Fluid Friction- waves knocking against a boat in the ocean

• Rolling Friction- a ball going down a hill

Which of the following is NOT a way to reduce friction?

• Increase the force pushing the surfaces together

• Using a lubricant

• Switching from sliding to rolling friction

• Making surfaces smoother

Look at the image, what would be the Net Force and Direction of Motion?

• 170 N to the Right

• 170 N to the Left

• 230 N to the Right

• 230 N to the Left

Look at the image This object is accelerating at 2 m/s^2 and has a mass of 8kg. How much Force (F) is being applied?

Force=(mass)*(acceleration)

• 16 kg/m/s^2

• 4 kg/m/s^2

• 8 kg/m/s^2

• 2 kg/m/s^2

Why would you weigh less on the moon?

• The moon has less of a gravitational pull.

• The moon makes you have less mass.

• The moon has more of a gravitational pull

• The moon makes you have more mass.