Question

lo: swbat analyze data and observations to distinguish between speed and velocity in linear motion.
dol: given a set of problems, students will analyze data and observations to distinguish between speed and velocity in linear motion by answering at least 4 of 5 questions correctly.
1 tom is analyzing data from a remote - controlled car moving in a straight line. he has information about the cars position and time. which statement correctly describes how tom can distinguish between the cars speed and velocity?
a. speed includes both how fast and in what direction the car is moving, while velocity only includes how fast it is moving.
b. speed is calculated using time and the direction traveled, while velocity is calculated using only time.
c. speed tells how fast the car is moving regardless of direction, while velocity includes both speed and direction.
d. speed and velocity are always the same if the car is accelerating in a straight line.
2 a train travels on a curved track and its speed is measured to be 80 km/h. at various points along the track, the direction of the train changes, causing its velocity to vary continuously. which statement best describes the difference between the trains speed and velocity in this scenario?
a. the trains speed is always 80 km/h, regardless of direction, while its velocity varies because it depends on both the speed and the changing direction of motion.
b. the trains velocity remains constant at 80 km/h because the speed is constant, and only changes in direction affect the speed.
c. the trains speed is a measure of how quickly it is traveling at any moment, while its velocity can be constant even if the speed changes, as long as the direction remains unchanged.
d. the trains velocity is equal to its speed multiplied by time, which varies continuously as the train changes direction.

Explanation:

Speed is a scalar quantity that only indicates how fast an object is moving. Velocity is a vector quantity that includes both the speed of an object and the direction of its motion. For the first question, this definition helps identify the correct answer. For the second question, on a curved - track, the speed can be constant but the direction changes, so velocity changes.

Answer:

1. C. Speed tells how fast the car is moving regardless of direction, while velocity includes both speed and direction.
2. A. The train's speed is always 80 km/h, regardless of direction, while its velocity varies because it depends on both the speed and the changing direction of motion.