Mechanics: Newton's Laws of Motion
Newton's Laws of Motion: Audio Guided Solution
Problem 16:
Mira and Tariq are lab partners for the Pulley and Bricks Lab. They have determined that the 2.15-kg brick is experiencing a forward tension force of 9.54 N and a friction force of 8.69 N as it is accelerated across the table top. Construct a free body diagram depicting the types of forces acting upon the brick. Then determine the net force and acceleration of the brick.
Audio Guided Solution
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Fnet: 0.85 N, forward
a: 0.40 m/s/s, forward (rounded from 0.395 m/s/s)
a: 0.40 m/s/s, forward (rounded from 0.395 m/s/s)
Habits of an Effective Problem Solver
- Read the problem carefully and develop a mental picture of the physical situation. If necessary, sketch a simple diagram of the physical situation to help you visualize it.
- Identify the known and unknown quantities in an organized manner. Equate given values to the symbols used to represent the corresponding quantity - e.g., vo = 0 m/s; a = 4.2 m/s/s; vf = 22.9 m/s; d = ???.
- Use physics formulas and conceptual reasoning to plot a strategy for solving for the unknown quantity.
- Identify the appropriate formula(s) to use.
- Perform substitutions and algebraic manipulations in order to solve for the unknown quantity.
Read About It!
Get more information on the topic of Newton's Laws of Motion at The Physics Classroom Tutorial.
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