Question

*** Please answer ALL three questions including question 1, question 2 that also comes with part A and B, and finally question 3. ***

1) A car rides on four wheels that are connected to the body of the car by spring assemblies that let the wheels move up and down over bumps and dips in the road. When an 80 kg person sits on the left front fender of a small car, this corner of the car dips by about 1 cm. Treating the spring assembly as a single spring, what is the approximate spring constant?

2) Dynamic climbing ropes are designed to noticeably stretch under load to lessen the forces in a fall.

A) A 20 m length of climbing rope is supporting a weight and stretches by 40 cm. This single rope is replaced by a doubled rope—two pieces of rope next to each other. How much does the doubled rope stretch?

B) A 20 m length of climbing rope is supporting a climber and stretches by 120 cm. When the climber is supported by a 40 m length of rope, by how much does the rope stretch?

3) Static climbing ropes are designed to be relatively stiff, stretching less than dynamic ropes. To meet a certain specification, an 11-mm-diameter rope must experience a maximum elongation of 2.5% when supporting a 75 kg load. What is the minimum Young’s modulus?

Answer #1

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Question 4
10 pts
A rocket launcher has a spring constant of 783 N/m. What force is
required to stretch the spring a distance of 2 m? You must show
work to earn credit for your answer.
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Question 5
10 pts
A spring has a spring constant of 96 N/m. How much work is done
when the spring stretches...

Please Answer all 5 questions (2,4,5,6, and 7)
Question 2: At a summer camp, 72% of the
campers participate in rope climbing and 26% participate in
canoeing. 83% of the campers participate in rope climbing, canoeing
or both. what is the probability that a randomly selected camper
participate in both rope climbing and canoeing.
Answer choices: A) 0.11 B) 0.15 C) 0.69 D) 0.98 E)
Cannot Be Determined
Question 4: According to school records, your
school’s softball team wins 62% of...

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