Physics Test Corrections

A 90 kg sky diver jumps out of a helicopter, what is his acceleration?

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Equation: Acceleration = Force/Mass

​#1

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Multiple Choice

A 90 kg sky diver jumps out of a helicopter, what is his acceleration?

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• 16.7 m/s²

• 10 m/s²

• 26.7 m/s²

• 6.7 m/s²

If both of the weights are .75 kg, which diagram would have a greater acceleration?

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Equation: Acceleration = Force/Mass

#2

Multiple Choice

If both of the weights are .75 kg, which diagram would have a greater acceleration?

• diagram 2, 3.75 m/s²

• diagram 1, 13.3 m/s²

• diagram 1, 7.5 m/s²

• diagram 2, 6.7 m/s²

Two players exert opposite forces on a ball that's .7 kg, what is the acceleration of the ball?​

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Equation: Acceleration = Force/Mass

​#3

Multiple Choice

Two players exert opposite forces on a ball that's .7 kg, what is the acceleration of the ball?

• 71.43 m/s²

• 125 m/s²

• 75 m/s²

• 50 m/s²

What would be the car's acceleration if the car's mass is 1400 kg?

Acceleration = Force/Mass

#4

Multiple Choice

What would be the car's acceleration if the car's mass is 1400 kg?

• 4.28 m/s²

• 1.42 m/s²

• 2.86 m/s²

• .714 m/s²

What is the instantaneous speed at .3 seconds into the drop?

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Equation: Speed = Distance/Time

#5

Multiple Choice

What is the instantaneous speed at .3 seconds into the drop?

• .3 m/s

• 4.8 m/s

• .432 m/s

• 1.44 m/s

The graph above represents a car driving down a straight highway. Which of the following is the acceleration of the car at t = 4 seconds?

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​Acceleration = distance/time

​#6

Multiple Choice

The graph above represents a car driving down a straight highway. Which of the following is the acceleration of the car at t = 4 seconds?

• 0 m/s²

• 5 m/s²

• 10 m/s²

• 20 m/s²

A ball initially rolling at 8 m/s comes to a stop in 20 seconds. Assuming the ball has uniform acceleration, how far does it travel during this time interval?​

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​time =

​#7

Multiple Choice

A ball initially rolling at 8 m/s comes to a stop in 20 seconds. Assuming the ball has uniform acceleration, how far does it travel during this time interval?

• 8 m

• 160 m

• 2.25 m

• 80 m

Joe walked 15 meters from his seat to his teacher’s desk to turn in an assignment. On the way back to his seat Joe stops and talks to Sarah. Sarah’s desk is in the front row, exactly 4 meters from the teacher’s desk. What is Joe’s displacement in meters?

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Do we add or subtract when finding displacement?​

#8​

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Fill in the Blanks

A car travels 50 km north. It then turns around and travels 30 km south. What is the car's displacement?

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Do we add or subtract?​

#9

Multiple Choice

A car travels 50 km north. It then turns around and travels 30 km south. What is the car's displacement?

• 80 km South

• 20 km South

• 80 km North

• 20 km North

The graph below represents the motion of a car travelling horizontally along a straight stretch of road in the positive direction.

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According to the information and graph above, what is the displacement of the car between t = 2 s and t = 4 s?​

#10

Multiple Choice

According to the information and graph above, what is the displacement of the car between t = 2 s and t = 4 s?

• 10 meters

• 15 meters

• 20 meters

• 5 meters

In the diagram below, a student goes from home to the gym, then to a steakouse, and finally to the store. Each stage of the journey is shown as a separate vector. When all of the vectors are added together, which direction is the sum of all the vectors?​

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#11​

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Fill in the Blanks

​Dan walked 200 meters East on East Street, then walked 150 meters North on North Street.

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​Which is the shortest distance the Dan can travel to go from his house to the museum?

#12

Multiple Choice

Which is the shortest distance the Dan can travel to go from his house to the museum?

• 150 meters

• 250 meters

• 50 meters

• 350 meters