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Mashutka [201]
3 years ago
10

On a double-well roller coaster, the person starts from a height of 10.5 meters, the height of the middle bump of the well is 6.

7 meters. How much kinetic energy does this person have at the middle of the middle bump from the bottom if the mass of the person is 79 kg? (g=9.8 m/s2) Round to two decimal places.
Physics
1 answer:
Julli [10]3 years ago
6 0

Answer:

"2941.96 J" is the appropriate answer.

Explanation:

The given values are:

Mass,

m = 79 kg

Height,

h = 10.5 m

Now,

The total energy at the given height will be,

⇒ Potential energy = mgh

On substituting the values, we get

                                = 79\times 9.8\times 10.5

                                =8129.1 \ J

So,

⇒ At height 6.7 m, total energy =  At height 10.5 m, total energy

On substituting the values, we get

⇒ Potential \ energy+Kinetic \ energy=8129.1      

⇒       79\times 9.8\times 6.7+Kinetic \ energy=8129.1

⇒                5187.14+Kinetic \ energy=8129.1

⇒                                   K.E=8129.1-5187.14

⇒                                   K.E=2941.96 \ J

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