Basic Biomechanics
7th Edition
ISBN: 9780073522760
Author: Susan J Hall
Publisher: McGraw-Hill Education
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Chapter 3, Problem 5AP
Use a trigonometric solution to find the magnitude of the resultant of the following coplanar forces: 60 N at 90°, 80 N at 120°, and 100 N at 270°. (Answer: 49.57 N)
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Students have asked these similar questions
An airplane flying directly eastward at a constant speed travels 293 km in 2.0 h.
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(b) what is the instantaneous velocity?
If a person has a vertical force of 10.25N with a nylon strap of a 2.5cm of width and length of
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A scientist was investigating if differences in the frictional work performed on a model car can change
depending on its mass (in grams) and whether the car moves up or down an inclined plane. They decided to
measure the amount of frictional force experienced by the model car and the distance it traveled in meters.
The scientists were able to evaluate the frictional work using the following data.
Mass (g)
Distance (m) Force
Work Done by Friction (J)
car going up the incline
100
39
0.063
2.457
car going down the incline 70
39
0.2309 ?
It is known that the relationship between force and distance determines the work done by friction (W+).
W₁ = fd
Wf work done by friction
f = force
d = distance
Question:
How much work done by friction was exerted on the car as it moved down the inclined plane?
You may use a calculator.
1
2.457
9.005
11.46
16.16
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Chapter 3 Solutions
Basic Biomechanics
Ch. 3 - Prob. 1IPCh. 3 - How much force must be applied to a 0.5-kg hockey...Ch. 3 - A rugby player is contacted simultaneously by...Ch. 3 - Prob. 4IPCh. 3 - Draw the horizontal and vertical components of the...Ch. 3 - A gymnastics floor mat weighing 220 N has...Ch. 3 - What is the volume of a milk crate with sides of...Ch. 3 - Prob. 8IPCh. 3 - If the contents of the crate described in Problem...Ch. 3 - Two children sit on opposite sides of a playground...
Ch. 3 - Prob. 1APCh. 3 - Gravitational force on planet X is 40% of that...Ch. 3 - A football player is contacted by two tacklers...Ch. 3 - A 75-kg skydiver in free fall is subjected to a...Ch. 3 - Use a trigonometric solution to find the magnitude...Ch. 3 - Prob. 6APCh. 3 - In the nucleus pulposus of an intervertebral disc,...Ch. 3 - Prob. 9APCh. 3 - Two muscles develop tension simultaneously on...
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