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 10 of the 12 problems below. Show your work. Answer the questions directly in this
template.
1. James operates an airplane that departs from JFK Airport with a constant net force of 40,000 N. The
mass of James is 80 kg and the plane’s mass is 30,000 kg. What is the net force that acts on James?
The net force that acts on James is:
F=ma=mg=80×9.8=784N
2. 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?
Susan’s acceleration:
F/m= 30/45=0.667m/s^2
David’s acceleration: F/m=30/100=0.300m/s^2
3. Alice holds a black belt in Taekwondo and her fist has a mass of 0.5 kg. Her fist obtains a velocity of 5

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- Fall '10
- GUAN
- Acceleration, Force