Forces Fan Carts for the sociology majors who go to the university of Ibrahim PDF

Preview

Summary

very good groovy toons you will enjoy this it has all the things you need ( not really lolllllzzz) there's tons of things to enjoy I hope you have fun learning at your university. education is very important...

Description

Name:

Lillian McGuire

Date:

1/14/21

Student Exploration: Force and Fan Carts Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: force, friction, position, speed Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. If you are pushing a shopping cart and you start pushing harder, what happens? The shopping cart gets faster. 2. What happens to a shopping cart if you get it rolling and then release it? It rolls until it gets to rest. Gizmo Warm-up 1. In the Gizmo, turn the fan Off. Click Play (

). Did the cart move?

No it did not. 2. Click Reset ( ). Press the Low fan speed button to turn on the fan. Click Play. What happened? It rolled to the finish line. 3. A force is something that causes change in motion. What provided the force that made the cart speed up? The fan. 4. The speedometer shows the cart’s speed, or how fast it moves. A speed of 30 cm per second means the cart moves 30 cm every second. What was the final speed of the cart? 15 cm/s 5. Friction is a force that works against motion as surfaces rub each other. Click Reset. Select the No Friction surface. Click Play. What was the final speed this time? 18 cm/s

Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved

Get the Gizmo ready: Activity A: Force and motion

● ● ● ●

Click Reset. Change the Surface to Wood. Be sure there are no objects on the cart. The Fan speed should be set to Low.

Question: How does force affect motion? 1. Run Gizmo: Press P  lay. What was the final speed of the cart? 8.2 cm/s 2. Predict: Would the cart’s final speed be higher or lower if the fan were set to Medium instead of Low? The carts speed would be higher. 3. Experiment: Click Reset. Change Fan speed to Medium. Click Play. What was the cart’s final speed? 14 cm/s 4. Draw conclusion: Did the cart speed up more quickly with the fan on Low or Medium? The cart speeds up more on Medium. 5. Generalize: On Medium the fan provides more force than on Low. Make two rules by filling in the blanks below. (Put the same word in both blanks.) Force causes the If more force is used, the

speed

of the cart to change.

speed

the cart changes more quickly.

6. Predict: Select the DATA tab. Choose a Bar graph or Line graph. This graph shows the cart speed over time. How would the graph be different if the fan were on High? Why? When the fan is on high, there will be a higher incline because the speed is faster. 7. Test: Check your prediction with the Gizmo. What do you observe? I see that the fan moved at a faster pace when the fan was on high, therefore the incline being higher. 8. Extend: Design an experiment to test the effect of force on a loaded cart. You can choose any surface and any object to load onto the cart. In the space below, report your question, prediction, procedure, observations, and conclusion. -

How will the graph change if an object is placed on the cart at the same speed? - my prediction is the cart will move slower with an object on the cart so the graph will have a lower incline. - my procedure will be to set the fan speed to medium, and put the bottle of soda on the Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved

cart and watch the data graph. - my observations are the cart does not move on the wood surface, but on the non friction surface it moves slowly. - conclusion: as more objects are put on the cart, the more time it takes for the cart to finish.

Activity B: Running out of steam?

Get the Gizmo ready: ●

Click Reset.

Question: Why do objects slow down when there is nothing pushing them? 1. Observe: Use the Gizmo to explore the question above. Try different objects and surfaces. Each time, turn the fan Off while the cart is moving. (You may find it helpful to pause the Gizmo with the Pause ( ) button, turn the fan off, and then click Play to restart.) 2. Form hypothesis: What causes an object to slow down after no longer being pushed? As the fan turns off, the cart will slow down. 3. Predict: Set Fan speed to High. Based on your hypothesis, ✏ circle all s urfaces that will cause a moving cart to slow down after the fan is turned off. (You may circle more than one.)

4. Test: Run the trials using the Gizmo. Which surface(s) caused the cart to slow down?

5. Draw conclusion: What causes objects to slow down when they are no longer pushed? The surfaces caused the cart to slow down. Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved

6. Think about it: Imagine the track in the Gizmo went on forever. If there were no friction, how long would it take the cart to stop after you turned off the fan? Explain. It would never stop, because it would stay at a constant speed. 7. Analyze: Which surface in the Gizmo has the most friction? Explain how you can tell. Wood has the most friction because it takes the cart a longer amount of time to reach the finish line.

Get the Gizmo ready: Activity C:

● ● ● ●

Patterns in motion

Click Reset. Select No friction. Place only the soda and book on the cart. Set the Fan speed to High. Select No Friction.

Question: Are there any patterns in the motion of objects? 1. Run Gizmo: Be sure N  o friction is selected. Click Play. After about 3 seconds, turn the fan Off. (We recommend that you click Pause, turn the fan off, and then click Play to restart the Gizmo.)

2. Observe: Select the DATA tab. Select Position. The position of the cart is its location (how far from the start line). What pattern do you see in the position data after the fan is off? It is a direct graph. 3. Connect: How is the final speed of the cart related to the pattern in the position data? The final speed is the constant speed which is why the graph is a linear line. 4. Analyze: Why does that pattern happen? (Hint: Think about what “cm per second” means.) The slope is constant. 5. Observe: Select Speed. What pattern do you see in the speed data, after the fan is off? The graph increases until it hits three seconds, and then once the fan is turned off, the speed remains around 30 cm/s. 6. Connect: How does the bar graph (or line graph) show the pattern you found? It represents the speed of the cart versus the time. Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved

7. Generalize: Fill in the blank below to state a rule based on what you saw. If there is no force, the

speed

does not change at all.

Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved...