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Energy Homework 4

Tips for Fighting Homework Fatigue in 4 Minutes

  • Posted August 01, 2014 by Christina Schiel in College Life
  • Tags:College Life

It happens to every student: Your eyes start to hurt because you've been staring at the computer screen for too long without blinking. Your forehead is practically resting on the screen since your body has been inching closer to it. Your back hurts because of the leaning, your eyes just want to close, and best of all, you have homework to finish.

Yes, taking a power nap sounds appealing. Yes, watching a 30-minute TV show would give your brain a break. However, if you're like most of us, a power nap turns into not getting out of bed and that 30-minute TV show transforms into two hours of channel surfing. Fight the desire to tackle the assignment later when you're "better rested," because you and I both know that you can conquer this homework assignment now; you just don't want to.

Here's the solution: Trick yourself into getting the energy to complete it. In four minutes, you can persuade your mind that now is the perfect time to devour that low-hanging fruit.

Minutes 1 and 2: Stand up. Walk away from your computer. Shake out your arms and legs. Roll your shoulders backwards then forwards. Kick out your feet. Roll your wrists. Walk up and down stairs if you have them. I even encourage you to do a few jumping jacks. Whatever you do, just keep moving.

Why it works: The body and mind have a dependent relationship on each other. If you're couch-potatoing it, your brain is going to get sleepy. However, if your body is moving, your brain knows that it has to be ready for anything.

Minute 3: Get a pen and paper—don't go back to your homework yet!—and write down all the reasons why you're getting your degree. Don't worry about full sentences, this won't be graded. You can put short phrases such as "children," "get a job," "promotion," "exceed expectations," whatever you like. Write as many reasons as you can, and when you run out of reasons, simply write, "I can succeed. I will succeed" until you hit minute 4.

Why it works: Now that your brain is more alert thanks to the physical activity, it can focus on the bigger picture and not the lonely TV remote. What you're writing on paper is persuading your brain to think beyond just tonight and how this assignment is a step toward long-term success. Your brain will believe what you tell it to believe, so put the right motivators out there.

Minute 4: Bribery and Trickery. For the last minute I want you to do two things. First, think about what you can do tomorrow, if you finish your homework tonight. Don't write them down; just let them fill your thoughts. Think, "If I finish this assignment tonight... I won't have to worry about it tomorrow; I can watch that baseball game without multitasking; I can have homework-free time with my kids." Envision it and imagine what tomorrow will be without this homework lurking. Second, smile a big show-off-your-teeth grin. Yes, it'll feel weird just smiling randomly, but do it.

Why it works: Because bribery and trickery work. Our brains are programmed for tit-for-tat. There has to be a reward for everything. Tell yourself what the reward is now, so you have something to work toward. As for smiling, a smile can trick your body into thinking that you should be happy right now. A frown can persuade your brain otherwise. Remember, you control what your brain thinks. Make it positive.

Now, you re-energized student, be inspired and go tackle that assignment!

For more tips on how to succeed at school, read our College Life blog.

Unformatted text preview: duong (jld3967) Homework 4: Work and Energy gust (57605) 1 This print-out should have 24 questions. Multiple-choice questions may continue on the next column or page fnd all choices beFore answering. 001 (part 1 of 2) 10.0 points An athlete whirls a 7 . 58 kg hammer tied to the end oF a 1 . 2 m chain in a simple horizontal circle where you should ignore any vertical deviations. The hammer moves at the rate oF 1 . 22 rev / s. What is the centripetal acceleration oF the hammer? Assume his arm length is included in the length given For the chain. Correct answer: 70 . 5116 m / s 2 . Explanation: Convert revolutions per second to radians per second. 2 (1 . 22 rev / s) = 7 . 66549 rad / s . The centripetal acceleration is a c = v 2 r = ( r ) 2 r = r 2 = (1 . 2 m) (7 . 66549 rad / s) 2 = 70 . 5116 m / s 2 . 002 (part 2 of 2) 10.0 points What is the tension in the chain? Correct answer: 534 . 478 N. Explanation: The chain supplies the centripetal Force, so its tension is T = m a c = (7 . 58 kg) (70 . 5116 m / s 2 ) = 534 . 478 N . 003 10.0 points IF you exert a Force oF 18 N to liFt a box a distance oF 1 . 17 m, how much work do you do? Correct answer: 21 . 06 J. Explanation: Work is W = F d = (18 N) (1 . 17 m) = 21 . 06 J 004 10.0 points A crate is liFted vertically 1.5 m and then held at rest. The crate has weight 100 N ( i.e. , it is supported by an upward Force oF 100 N). How much work is being done to hold the crate 1.5 m above the ground in this way? 1. None oF these 2. No work is being done. correct 3. More than 150 J 4. 150 J 5. A bit less than 150 J Explanation: No work is being done: W = F || d . IF F n is the supporting Force, then W = F n because the crate is not moving upward but is at rest: d = 0 during the time the crate is supported at rest. 005 (part 1 of 2) 10.0 points A person liFts a 4.7 kg cement block a vertical distance oF 1.5 m and then carries the block horizontally a distance oF 6.5 m. The acceleration oF gravity is 9 . 81 m / s 2 . a) Determine the work done by the person in the process. Correct answer: 69 . 1605 J. Explanation: Basic Concept: W = F d cos Given: m = 4 . 7 kg d 1 = 1 . 5 m d 2 = 6 . 5 m g = 9 . 81 m / s 2 1 = 0 2 = 90 duong (jld3967) Homework 4: Work and Energy gust (57605) 2 Solution: W person = F g d 1 cos 1 + F g d 2 cos 2 = m g d 1 cos 0 + m g d 2 cos 90 = m g d 1 = (4 . 7 kg) ( 9 . 81 m / s 2 ) (1 . 5 m) = 69 . 1605 J . 006 (part 2 of 2) 10.0 points b) Determine the work done by the force of gravity in the process. Correct answer:-69 . 1605 J. Explanation: Given: 1 = 180 Solution: W gravity = F g d 1 cos 1 + F g d 2 cos 2 = m g d 1 cos 180 + m g d 2 cos 90 =-m g d 1 =-(4 . 7 kg) (9 . 81 m / s 2 ) (1 . 5 m) =-69 . 1605 J ....
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