Force and Motion county assessment

INTRODUCTION: In the picture, we see astronaut Mark Vande Hei push a basketball, which moves away from him. Later in the clip, Mark pushes a fellow astronaut Joe Acaba. Both Joe and Mark move away from each other, but at a different speed than the basketball and Mark moved earlier. 

 

As you answer the questions that follow, think about how we can use the laws of force and motion to investigate the changes in motion of Mark, the basketball, and Joe.

• click this one to move on

• don't click this one

1. If we are calculating acceleration, our numerator would be _________________ and our denominator would be ______________________.

• force/motion

  
  

• Speed/time

• mass/speed

• force/time

2. When Mark floats in one stationary place in the pic, the forces acting on him are __________________________.

• Balanced

• 2. Unbalanced 

• 3. Weak 

• 4. Strong 

3. The variables that are important to be measured and/or calculated from the investigation in the picture are: 

• 1. Mass, gravity, change in velocity 

• 2. Speed, mass, pressure 

• 3. Force, time, gravity 

• 4. Mass, force, acceleration

4. In order to calculate the acceleration of the basketball, we need to know: 

• 1. Mark's mass, the basketball's mass, and the force applied to the ball. 

• 2. The force applied to the basketball and Mark's mass 

• 3. The force applied to the basketball and the basketball's mass. 

• 4. Mark's mass, and the basketball's mass. 

5. What units can we use to measure Mark's change in motion? 

• 1. m/s 

• 1. kg·m/s 

• 3. m 

• 4. m/s² 

6. If we're evaluating the change in motion over time, our independent variable will be _______________ and our dependent variable will be _________________.

• 1.   force/mass

•  mass/acceleration

• speed/time

• momentum/force

7. One of your classmates proposes a design for measuring the change of motion in the basketball with only one trial and another classmate designs their experiment to measure the change in motion 10 times. How many trials do you think you'll need in order to get reliable results on the change in motion of the basketball? 

•  

  1. More than one trial is important to get consistent results, but 10 trials might be more than necessary. 

• 2. 10 trials is enough if all 10 trials have the same outcome. 

• 3. One trial is likely enough to get accurate data. 

• 4. 10 trials is not enough to get consistent results. 

8. Cassy is investigating the change in speed of the basketball compared to Joe, as Joe pushes the basketball away from himself. Which of the following should be held constant between trials? 

• 1. The force applied to the basketball and Joe 

• 2. The mass of the basketball and Joe 

• 3. The ending speed 

• 4. The amount of time they traveled a certain distance 

9. Which of the following investigative questions could be answered based on the observations in the picture with the astronaut and the basketball? 

• 1. How does the size of the force affect the motion of objects in different directions? 

• 2. How does the motion of objects affect the force when the mass is the same? 

• 3. How does mass affect the change in motion of objects when they experience the same force? 

• 4. How does the mass change when forces are applied that cause a change in motion?