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# Identify the appropriate formulas necessary to solve specific scenario questions.

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Unit II Problem Solving Worksheet

This assignment will allow you to demonstrate the following objectives:

• Illustrate the scientific method within everyday situations. o Identify the appropriate formulas necessary to solve specific scenario questions. o Calculate and analyze the acceleration and the force in various situations.

• Explain Newton’s laws of motion at work in common phenomena. o Solve problems using mass and weight. o Explore the relationship between the first and second laws. o Identify action-reaction pairs in the third law.

Instructions: Choose 8 of the 10 problems below. Show your work in detail. Answer the questions directly in this tem- plate. Before doing this, it is highly recommending that you thoroughly review the three examples in the Unit Lesson.

1. Susan pushes her dad, David, on an ice rink with a force of 30 N. She weighs 45 kg and her dad weighs 100 kg. What are the accelerations of Susan and David?

Hint: For an example of this problem being worked out click here. To view a transcript of this video, click here.

Click here for a PowerPoint version of the video. To view a transcript of this PowerPoint click here.

2. Alice holds a black belt in Taekwondo and her fist has a mass of 0.5 kg. Her fist obtains a velocity of 5 m/s in 0.1 seconds from rest. Evaluate the average net force applied to the fist.

Hint: For an example of this problem being worked out click here. To view a transcript of this video, click here.

Click here for a PowerPoint version of the video. To view a transcript of this PowerPoint click here.

3. A lunar exploration vehicle was created by a research team. It weighs 3,000 kg on the earth. It needs an accelera- tion of 10 m/s2 on the moon. In order to have the same acceleration, what will be the net force acting on the vehi- cle on the earth? To view a transcript of this video, click here (Unit II PS_3.docx). Also, click here(Unit II PS_3.pptx) to review the power point presentation.

Hint: For an example of this problem being worked out click here. To view a transcript of this video, click here.

Click here for a PowerPoint version of the video. To view a transcript of this PowerPoint click here.https://www.youtube.com/playlist?list=PLa152-oe8zVMsLP-F6dXMbix4yZdmmox_https://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_1.docxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/Unit_II_PS_1.pptxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_1.docxhttps://www.youtube.com/playlist?list=PLa152-oe8zVMsLP-F6dXMbix4yZdmmox_https://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_2.docxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/Unit_II_PS_2.pptxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_2.docxhttps://www.youtube.com/playlist?list=PLa152-oe8zVMsLP-F6dXMbix4yZdmmox_https://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_3.docxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/Unit_II_PS_3.pptxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_3.docx

Unit II Problem Solving Worksheet 4. Three people are pushing a 500 kg of box in the same direction. Applied forces are 30 N, 20 N,

and 10 N respectively. If the acceleration of the box is 0.02 m/s2, what is the magnitude of a force created by fric- tion?

Hint: For an example of this problem being worked out click here. To view a transcript of this video, click here.

Click here for a PowerPoint version. To view a transcript of this PowerPoint click here.

5. You drive a 6,000 kg boat due north, while the wind exerts a force of 600 N due south and the water exerts a re- sistive force of 1,200 N due south. The generated force by the boat’s engines is 4,200 N. Find the magnitude and direction of the boat’s acceleration.

Hint: For an example of this problem being worked out click here. To view a transcript of this video, click here.

Click here for a PowerPoint version of the video. To view a transcript of this PowerPoint click here.

6. A machine accelerates a 5 kg missile from rest to a speed of 5 km/s. The net force accelerating the missile 500,000 N. How long does it take to arrive at the speed of 5 km/s?

Hint: For an example of this problem being worked out click here. To view a transcript of this video, click here.

Click here for a PowerPoint version of the video. To view a transcript of this PowerPoint click here.

7. Peter found an amazing fact in an amusement park when he tried to ride the Magic Mountain Superman. Powerful magnets accelerate a car and its riders from zero to 45 m/s in 7 seconds. Suppose the mass of the car and riders is 5,600 kg. What is the average net force exerted on the car and riders by the magnets?

Hint: For an example of this problem being worked out click here. To view a transcript of this video, click here.

Click here for a PowerPoint version of the video. To view a transcript of this PowerPoint click here.

8. Two forces of 10 N and 30 N are applied to a 10 kg box. Find (1) the box’s acceleration when both forces point due east and (2) the box’s acceleration when 10 N force points due east and 30 N force points due west.

Hint: For an example of this problem being worked out click here. To view a transcript of this video, click here.

Click here for a PowerPoint version of the video. To view a transcript of this PowerPoint click here.

9. When a 60 g (=0.06 kg) tennis ball is served by a newly invented machine, it accelerates from zero to 50 m/s. The ball experiences a constant acceleration due to the impact with the racket over a distance of 0.5 m. What is the net force acting on the ball? Use the formula: a= (vf2-vi2)/2d regarding the relation among acceleration a, final ve- locity vf, initial velocity vi and the traveled distance of an object d.

Hint: For an example of this problem being worked out click here. To view a transcript of this video, click here.

?

20 N

30 N

8810 Nhttps://www.youtube.com/playlist?list=PLa152-oe8zVMsLP-F6dXMbix4yZdmmox_https://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_4.docxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/Unit_II_PS_4.pptxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_4.docxhttps://www.youtube.com/playlist?list=PLa152-oe8zVMsLP-F6dXMbix4yZdmmox_https://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_5.docxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/Unit_II_PS_5.pptxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_5.docxhttps://www.youtube.com/playlist?list=PLa152-oe8zVMsLP-F6dXMbix4yZdmmox_https://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_6.docxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/Unit_II_PS_6.pptxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_6.docxhttps://www.youtube.com/playlist?list=PLa152-oe8zVMsLP-F6dXMbix4yZdmmox_https://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_7.docxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/Unit_II_PS_7.pptxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_7.docxhttps://www.youtube.com/playlist?list=PLa152-oe8zVMsLP-F6dXMbix4yZdmmox_https://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_8.docxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/Unit_II_PS_8.pptxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_8.docxhttps://www.youtube.com/playlist?list=PLa152-oe8zVMsLP-F6dXMbix4yZdmmox_https://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_9.docx

Unit II Problem Solving Worksheet

Click here for a PowerPoint version of the video. To view a transcript of this PowerPoint click here.

10. Cole is riding a sled with initial speed of 5 m/s from west to east. The frictional force of 50 N exists due west. The mass of the sled and Cole together is 100 kg. How far does the sled go before stopping? Use the formula: a= (vf2- vi2)/2d regarding the relation among acceleration a, final velocity vf, initial velocity vi and the traveled distance of an object d.

Hint: For an example of this problem being worked out click here. To view a transcript of this video, click here.

Click here for a PowerPoint version of the video. To view a transcript of this PowerPoint click here.https://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/Unit_II_PS_9.pptxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_9.docxhttps://www.youtube.com/playlist?list=PLa152-oe8zVMsLP-F6dXMbix4yZdmmox_https://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_10.docxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/Unit_II_PS_10.pptxhttps://online.columbiasouthern.edu/CSU_Content/Courses/General_Studies/PHS/PHS1110/16F/UnitIIPS_10.docx

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