Basic Biomechanics
7th Edition
ISBN: 9780073522760
Author: Susan J Hall
Publisher: McGraw-Hill Education
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Chapter 14, Problem 7AP
A cavewoman swings a 0.75-m sling of negligible weight around her head with a centripetal force of 220 N. What is the initial velocity of a 9-N stone released from the sling? (Answer: 13.4 m/s)
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Suppose as astronaut has landed on Mars. Fully equipped, the astronaut has a mass of 130 kg, and when the astronaut gets in scale, the reading is 477 N. What is the acceleration due to gravity on Mars?
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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A spring has a constant of 875 N/m. What hanging-mass will cause this spring to stretch 4.5 m?
Chapter 14 Solutions
Basic Biomechanics
Ch. 14 - If you had to design a model of the human body...Ch. 14 - Construct a table displaying common units of...Ch. 14 - Skilled performance of a number of sport skills is...Ch. 14 - Prob. 5IPCh. 14 - How much angular impulse must be supplied by the...Ch. 14 - Given the following principal transverse axis...Ch. 14 - A volleyball players 3.7-kg arm moves at an...Ch. 14 - A 50-kg diver in a full layout position, with a...Ch. 14 - Prob. 10IPCh. 14 - The radius of gyration of the thigh with respect...
Ch. 14 - A 0.68-kg tennis ball is given an angular momentum...Ch. 14 - A 7.27-kg shot makes seven complete revolutions...Ch. 14 - Prob. 5APCh. 14 - The patellar tendon attaches to the tibia at a 20...Ch. 14 - A cavewoman swings a 0.75-m sling of negligible...Ch. 14 - A 7.27-kg hammer on a 1-m wire is released with a...Ch. 14 - Discuss the effect of banking a curve on a...
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- When Galileo Galilei rolled a ball down an inclined plane, it traveled 1.0 meters in the first second, and a total of 4.0 meters in the first two seconds. What was its acceleration on this inclined plane? 2.0 meters per second2 3.0 meters per second2 4.0 meters per second2 5.0 meters per second2 6.0 meters per second2arrow_forwardUsing the Michaelis-Mentan graph pictured (graphing initial velocity and PNPP concentration), identify Vmax and Km as well as possible. Then, using the Lineweaver-Burk graph (graphing 1/Vo and 1 / PNPP concentration), label the reciprocals of Vmax and Km on the graph and use them to calculate Km and Vmax.arrow_forwardWhat is the relationship between Net force, mass and acceleration. Newton’s second law of motion?arrow_forward
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