Physics Midterm 2021-2022

A honey-bee flaps its wings 200 times per second. How much time is required for one wingbeat in milliseconds.

• 50 ms
• 5 ms
• 500 ms
• 0.5 ms

Which of the following quantities has units of DISPLACEMENT?

• 32 ft/s^2

• -120 m/s
• 9.8 m/s2

• 186,000 mi

Which of the following quantities has units of VELOCITY?

• -120 m/s
• 9.8 m/s^2 downward
• 186,000 mi
• 40 km southwest

An object moves 15.0 m north and then 11.0 m south. Find both the distance traveled and the magnitude of its displacement. (HINT: If you need help, draw a picture to help you solve this question, do it!!!)

• 4.0 m distance, 26.0 m displacement
• 4.0 m distance, 4.0 m displacement
• 26.0 m distance, 4 m displacement
• 26.0 m distance, 26.0 m displacement

What is velocity?

• The quickness of an object
• The location of an object
• Acceleration
• Speed in a specific direction

Which graph demonstrates the greatest positive speed?

• A
• B
• C
• D

Ms. Goldstein's students received the following grades on their exams: 3 students received a 60%, 4 students received an 80%, and 2 students received a 90%, and 1 student received a 100%. What is the class average?

• 0.65
• 0.78
• 0.825
• 0.75

The correct equation to calculate speed is

• distance/time
• distance x time
• time/distance
• distance/time^2

The students are arguing over the difference between speed and velocity. One student says, "Speed is a vector because it describes how fast object is travelling. Velocity is a scalar because it tells how fast and what direction an object is travelling." Which of the following statements is correct?

• The students' understanding of all four terms (speed, velocity, scalar, and vector) is correct
• The students' understanding of speed and velocity is incorrect but their understanding of scalar and vector is correct
• The students' understanding of all four terms (speed, velocity, scalar, and vector) is incorrect
• The students' understanding of speed and velocity is correct but their understanding of scalar and vector is incorrect.

Find the distance Sara walks from A to B, B to C, then C to D.

• 11 m
• 5 m
• 3 m