Question

1. What two quantities do you need to know to measure speed?

2. Which of the following is a correct way to report an example of the speed of an object?
a. 50 s/m
b. 50 m/km
c. 50 m/s
d. 50 s/km

3. What two kinds of information do you need to describe the velocity of an object?

4. How are speed and velocity different?

5. In what ways can acceleration of an object occur?

6. What describes the rate at which velocity changes?

7. What does velocity tell you about an object that speed does not?

Answer 1

Explanation:

2/c

3/both magnitude and direction are needed to define it.

4/Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement. Put another way, speed is a scalar value, while velocity is a vector.

5/There are three ways an object can accelerate: a change in velocity, a change in direction, or a change in both velocity and direction.

6/The rate at which velocity changes with time is called Acceleration is a measure of how quickly the velocity is changing.

7/The instantaneous speed of an object is then the magnitude of its instantaneous velocity. Speed tells you how fast. Velocity tells you how fast and in what direction.