Use the following scenario #1-4 A weightlifter is performing dumbbell biceps cur
ID: 1323815 • Letter: U
Question
Use the following scenario #1-4
A weightlifter is performing dumbbell biceps curls (see Picture 2) holding a 105 N weight in their hand. The distance from the weight to their elbow is 0.35 m.
A= the relative angle of the elbow = 155-degrees.
B=the relative angle of the elbow = 90-degrees.
C=the relative angle of the elbow = 30-degrees
1. The angle between the line of pull of the biceps and the forearm is 135-degrees when the relative angle of the elbow is 155-degrees( A) . What is the torque created by the weight about the elbow?
2. The angle between the line of pull of the biceps and the forearm is 90-degrees when the relative angle of the elbow is 90-degrees(B). What is the torque created by the weight about the elbow?
3. The angle between the line of pull of the biceps and the forearm is 30-degrees when the relative angle of the elbow is 60-degrees(C). What is the torque created by the weight about the elbow?
4. At which relative angle of the elbow will the weightlifter need to more force to hold the weight at that angle?
a. the relative angle of the elbow of 155-degrees
b. the relative angle of the elbow of 90-degrees
c. the relative angle of the elbow of 30-degrees
Explanation / Answer
correct answer is C