Kami Export - aiden morrissey - Work and Energy Practice Problems - Part 1 PDF

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this man isnt just a dog with yellow dog not mine yet lol...

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Work and Energy Practice Problems - Part 1 Task: Solve each of the practice problems on work and energy. Use the formulas in the table below to help you. Open and edit this in Kami OR do your work by hand and take/upload a picture of your work. Make sure to SHOW ALL MATH WORK to receive full credit. Please circle or box all final answers and be sure to include the appropriate units inside your setup and in your final answer. Work & Energy Formulas: Forces & Motion Formulas: Work: W = Fd Force: F = ma Kinetic energy: KE = ½mv 2 Acceleration: a = Δv/t Velocity: v = x/t Velocity: v = √2KE /m Speed: s = d/t Potential energy: PE = mgh Gravitational acceleration: g = 9.8 m/s 2 1. An 1150 kg car reaches a speed of 28 m/s in 8.5 s, starting from rest. a. Calculate the car's acceleration. 3.3

b. Calculate the force acting on the car. 3795

c. Calculate the work done on the car.

37950

d. Calculate the car’s final kinetic energy. 450800

2. A 45 kg diver leaps from the top of a 40 m cliff. a. How much potential energy did she have before she leapt from the cliff? 17640

b. How much kinetic energy did she have on impact?

c. What is her final velocity when she hits the water? 28

d. If 2.24 mph = 1 m/s, what is her speed in mph when she hits the water?

62.72

3. I applied a 10 N force to pick up a 7.2 kg bowling ball up 1.5 m and then ran down the hall at 2 m/s, carrying the bowling ball. a. How much work did I do to pick up the bowling ball? 15

b. How much potential energy does the bowling ball have?

105.84

c. If I were to drop the bowling ball, what would its kinetic energy be when it hit the ground?

d. If my mass is 57.8 kg, what is the total kinetic energy of both me and my bowling ball as I ran? 130

e. If I ran twice as fast, still carrying the bowling ball, what is the total kinetic energy now?

520...