Unit 5 Energy Worksheet.doc - Unit 5 Energy Worksheet 12 pts 1(1 pt What is the equation for kinetic energy K.E = 1/2 m v2 2(1 pt What is the equation

Unit 5 Energy Worksheet.doc - Unit 5 Energy Worksheet 12...

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Unit 5: Energy Worksheet 12 pts. 1.(1 pt.) What is the equation for kinetic energy? 2.(1 pt.) What is the equation for gravitational potential energy? Show your work on all math problems including the equation that you used. 3. (2 pts.) Imagine a 10 kg block moving with a velocity of 20 m/s to the left. Calculate the kinetic energy of this block 4. (2 pts.) If a 50 kg student is standing on the edge of a cliff. Find the student’s gravitational potential energy if the cliff is 40 m high. (Continue to next page) K.E. = 1/2 m v 2 P.E. = mgh m = 10 kg v=20m/s 2000 Potential energy =mass*gravitational acceleration*height 50 kg x 9.81 m/s² x 40 m 19,620
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5. Suppose a skydiver ( mass = 75 kg ) is falling toward the Earth. When the skydiver is 100 m above the Earth he is moving at 60 m/s . At this point ……. a. (2 pts.) Calculate the skydiver’s Gravitational potential energy
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Unformatted text preview: (The sum of kinetic and potential energy) 6. (Optional Extra Credit): Calculate the TOTAL mechanical energy of a pendulum as it swings from its highest point to its lowest point. Pendulum mass is 4 kg. Use your equations for gravitational potential energy and kinetic energy to determine these values based on the data given below. Total energy is the sum of gravitational potential energy and kinetic energy. In this problem, round gravity to: g = 10 m/s 2 . a. Complete this table (up to 3 pts. EC) b. (1 pt. EC) What can you conclude about the total mechanical energy of a pendulum as it swings back and forth? Highest Point Lowest Point Velocity (m/s) 0.0 5.0 Height (m) 1.25 0.0 Kinetic Energy (J) Potential Energy (J) Total Energy (J) 235 1/2mass*velocity Mass*g*height...
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