Question

1. when scientists calculate the trajectory a satellite takes on its way to study a planet, what do you think they use? b. speed and velocity c. velocity and acceleration d. speed, velocity, and acceleration e. speed only 5. true or false: you can find the time an object traveled if you have the distance and the speed. b. true c. false fill in the blank(s) with the correct answer for 6 - 9. 6. descriptions of velocity must include the speed and the of motion. 7. speed can be represented by many different of distance and time. 8. a marathoner runs faster at the end of the race than she did at the beginning. she experienced.

Explanation:

Step1: Analyze satellite trajectory

To calculate a satellite's trajectory, speed (magnitude of motion), velocity (speed with direction), and acceleration (change in velocity) are all needed as they describe motion fully.

Step2: Recall time - distance - speed relation

The formula for time is $t=\frac{d}{s}$ where $t$ is time, $d$ is distance and $s$ is speed. So if distance and speed are known, time can be found.

Step3: Define velocity

Velocity is a vector quantity and descriptions of it must include speed and direction of motion.

Step4: Understand speed representation

Speed is a ratio of distance traveled to time taken, so it can be represented by different ratios of distance and time.

Step5: Identify marathoner's change

When a marathoner runs faster at the end, there is a change in velocity which is acceleration.

Answer:

1. d. Speed, velocity, and acceleration
2. b. True
3. direction
4. ratios
5. acceleration