Group Work 3 – GI Joe (option 2)

G. I. Joe paratrooper Ripcord (80 kg) is invading Cobra HQ. He’s brought in by a stealth bomber, where he jumps from an altitude of 10,000 ft (approx 3000 meters).

What is his initial acceleration?

If the chute failed, what would his average acceleration be over the trip? Assuming the average acceleration, how fast would he hit the ground?

Derive an equation for the ratio of terminal velocities between diving head first vs. spread eagle (lying flat).

At 1,000 ft, he pulls the parachute cord (a 1m x 5m rectangular chute). What is his initial acceleration due to drag?

How long does it take to reach the ground at Cobra HQ if the parachute opens at 1,000 ft?

Young softball batters are often instructed to “choke-up on the bat” by their coach. In terms of the moment of inertia, what exactly does this accomplish and why is it an advantage to the young batter? Come up with one other real-life example where either increasing or decreasing the moment of inertia becomes an advantage? Clearly describe the example and talk about the variables involved.

A person standing on the edge of a high cliff
throws a rock straight up with an initial
velocity of 17.50 m/s. The rock misses the edge
of the cliff as it falls back to Earth. What is the
position and velocity of the rock at 1.00 s, 3.5 s
and 4.0 s after it is thrown, neglecting the
effects of air resistance.

1.       Prepare an explanation of the nonconserved work of pulling and friction forces. Observe what happens when you rub your hands together quickly. Also, observe what happens when you hold a heavy book out to your side for as long as you can. What form do you think the friction and muscle work would take?

1) Define white privilege (McIntosh reading). Give three examples of white privilege. Do you know people who have experienced this? From what perspective?

To the Chegg Personel,
I need help, I'm waiting for the answers to my questions. This is the third time that I have asked for the same question and no one has answered yet my question. I need the answer as soon as possible please.

SIMPLE PENDULUM

1. What are the factors affecting the period of a simple pendulum?

1.1. What must you do to the length of a simple pendulum so that its period is doubled?

1.2. Determine the acceleration due to gravity in a location where a simple pendulum is 150.0 cm long makes 100 vibrations in 246 s.

1.3 What can you conclude from the graph? (Chegg on my laptop wouldn't let me upload so I've attached the link) - http://tinypic.com/r/j6o5qq/9​

Express the following angles in radians: (a) 30.0°, (b) 45.0°, (c) 60.0°, (d) 180.0°, and (e) 390°. Give as numerical values AND as fraction of π.

Mickey, a daredevil mouse of mass 0.0215 kg , is attempting to become the world's first "mouse cannonball." He is loaded into a spring-powered gun pointing up at some angle and is shot into the air. The gun's spring has a force constant of 60.9 N/m and is initially compressed a distance of 0.137 m from its relaxed position. If Mickey has a constant horizontal speed of 2.35 m/s while he is flying through the air, how high above his initial location in the gun does Mickey soar? Assume ?=9.81 m/s2 .

Explain the thermodynamic principle of a geothermal heat pump.

Consider the following special cases of collisions. In all cases, a cart of m1m1 comes in with a velocity vv and hits a cart m2m2coming in with velocity −v−v (same speed vv from the opposite direction). Most of these are answerable with either intuition or with mathematics. What are the final velocities of both carts if:

a. The collision is elastic, and both carts are the same mass? (Two swords collide in a swordfight)

b. The collision is inelastic, and both carts are the same mass? (Two identical twins charge-tackle each other)

c. The collision is elastic, and the mass of the first cart is much larger than the mass of the second cart? (Sword hits a dagger in a swordfight)

A block of mass 5kg is sits on a flat smooth lab bench. It is attached by two cords which are placed over pulley’s to hanging masses m1=8kg and m2=12kg on either side. Determine the acceleration of the system and the tension in each cord (they are different).

Use method of variation of parameters to solve

y'' + y = sin^2(x)

(a) Calculate the momentum of a 1900 kg elephant charging a hunter at a speed of 7.50 m/s.
kg·m/s
(b) Compare the elephant's momentum with that of a 0.0400 kg bullet fired at a speed of 600 m/s.
(momentum of elephant / momentum of bullet)
(c) What is the momentum of the 90.0 kg hunter running at 7.50 m/s after missing the elephant?

Analyze Adolph Hitler's rise to power and the policies he used to rule Germany. Textbook tyrant? Overheated Nationalist? Or the right man for at the right time for the right job?