Physics Final Exam 2024

Which of the following devices on a car can be used to cause the car to accelerate?

• the gas petal
• the brake
• the steering wheel
• all choices listed

A car starts from rest and accelerates at 4 m/s/s. How much time will it take the car to reach a speed of 20 m/s?

• 10 seconds
• 4 seconds
• 8 seconds
• 5 seconds

In order to do a positive amount of work you must

• exert a force and just move
• exert a force or move
• change an object's position
• exert a force and move in the direction of the force

You are riding a bicycle into a strong head wind, but manage to keep moving in a straight line at a constant speed. The net force on you is

• in the direction of your motion
• downward due to weight
• zero
• in the direction the wind is pushing you (backwards)

An object experiences a net force of 20 N and has an acceleration of 4 m/s². The object’s mass must be

• 20 kg

• 5 kg

• 80 kg

• 2 kg

Suppose a tree branch falls down to the ground with constant acceleration and takes 2 seconds to hit the ground. Which of the following statements regarding the path of the branch is true?

• It covers the same distance during the first second as it does during the last second.

• It covers more distance during the last second

• It covers less distance during the last second

• Its acceleration is increasing during the time it falls

A position vs time graph can be used to calculate an object's

• speed

• velocity

• acceleration

• momentum

A man walks 30 meters South, 25 meters West, 50 meters North, and 15 meters East in 80 seconds. What was his displacement?

• 35.4 meters NW
• 22.4 meters SE
• 119 meters
• 22.4 meters NW

A man walks 30 meters South, 25 meters West, 50 meters North, and 15 meters East in 80 seconds. What was the average velocity that he traveled?

• 0.44 m/s NW
• 1.5 m/s SW
• 1/5 m/s NW
• 0.28 m/s NW

The result of adding two vectors together is called the?

• independent vector
• resultant vector
• directional vector
• manipulated vector