PLEASE HELP ASAP A skateboarder weighing 1245 grams travels down hill at a rate of 367.5 centimeters in 3 seconds. What is the sk

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PLEASE HELP ASAP

A skateboarder weighing 1245 grams travels down hill at a rate of 367.5 centimeters in 3 seconds. What is the skateboarder’s kinetic energy?

A roller coaster cart travels to the top of the track with a PE of 125.7 J and descends to the bottom of the largest hill with a KE of 89.5 J. What is the mechanical energy of the roller coaster?

A golf ball weighing 86.4 grams is dropped from a height of 1.15 meters. What is the gravitational potential energy, GPE, of the golf ball before it is dropped?

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Khoii Minh 3 years 2021-08-12T11:01:28+00:00 1 Answers 8 views 0

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  1. thongdat2
    0
    2021-08-12T11:02:54+00:00
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    Answer:

    1. 89.5J

    2. 215.25J

    3. 0.975J

    Explanation:

    1. 0.5mv^2 = Ke

    2.pe+ke=me

    3. mgh = gpe

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