SK12 Physics 1b draft

Determine the equation of the line from 0 seconds to 15 seconds.

• p = -20t + 5

• p = 5t - 20

• p = 4t - 20

• p = 4t + 20

Click on ALL parts of the graph that indicate the object is at rest. The labeled points on the graph are: A, B, C, D, E, F, G.

• D

• A

• B

• E

• C

A student measures the distance it takes for a car to stop after hitting the brakes. Which unit of measurement would be best for this task?

• Millimeters

• Kilometers

• Meters

• Centimeters

The speed of light in a vacuum is 3.00 × 10^8 m/s. There are 1.6 km in a mile. What is its speed in miles per minute?

• A. 1.12 × 10^7 mi/min

• B. 1.12 × 10^10 mi/min

• D. 1.88 × 10^5 mi/min

The hypotenuse of a right triangle is 20.4 cm long, and one of the legs is 17.8 cm long. What is the length of the other leg?

• 1.6 cm

• 10.0 cm

• 27.1 cm

• 99.3 cm

Students calculate the average speed required for a ball to move a distance of 50 feet in 2 minutes. According to the International System of Units (often abbreviated SI), what units should their final answer have?

• meters per second

• feet per minute

• kilometers per hour

• miles per hour

Consider two vectors, A and B. Vector A represents a displacement of 10 units to the right, while Vector B represents a displacement of 10 units upward. Which statement about the distances represented by these vectors is correct?

• Vector A and Vector B represent the same distance since they have the same magnitude.

• Vector A represents a greater distance than Vector B because it is horizontal.

• Vector A represents a greater distance than Vector B because it is pointing to the right.

• Vector A and Vector B represent different distances because they have different directions.

What does a negative slope indicate about the object's motion on a position-time graph?

• A negative slope indicates that the object is stationary and not moving.

• A negative slope indicates that the object's velocity is negative, meaning it is moving opposite of the positive direction.

• A negative slope indicates that the object is moving in the negative direction, away from the reference point or origin.

• A negative slope indicates that the object is moving in the positive direction along the axis corresponding to position.

Which statement correctly differentiates between distance and displacement?

• A. Distance is a vector quantity representing the total length of the path traveled, while displacement is a scalar quantity representing the change in position from the initial point to the final point.

• B. Distance is a vector quantity representing the shortest path between two points, while displacement is a scalar quantity representing the total of the path traveled.

• C. Distance is a scalar quantity representing the change in position from the initial point to the final point, while displacement is a vector quantity representing the total length of the path traveled.

• D. Distance is the total path traveled by an object, while displacement is the straight-line distance between the initial and final positions of the object.

Which position vs. time graph accurately depicts the movement described? • The student leaves their house and runs to the park. • They stop to rest at the park. • After leaving the park, they walk back toward their house.

• A. [Graph A]

• B. [Graph B]

• C. [Graph C]

• D. [Graph D]