Question

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

Answer 1

Answer:

Step-by-step 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.