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d1i1m1o1n [39]
3 years ago
13

Sean climbs a tower that is 71.3 m high to make a jump with a parachute. The mass of Sean plus the parachute is 81.4 kg. If U =

0 at ground level, what is the potential energy of Sean and the parachute at the top of the tower?
Physics
1 answer:
myrzilka [38]3 years ago
3 0

Answer:

U = 56877.4 J

Explanation:

The potential energy of a body is that which it possesses because it is located at a certain height above the surface of the earth and can be calculated using the following formula:

U = mgh Formula (1)

Where:

U is the potential energy in Joules (J)

m is the mass of the body in kilograms (kg)

g is the acceleration due to gravity (m/s²)

h is the height at which the body is found from the surface of the earth in meters (m)

Data

m= 81.4 kg

g= 9.8 m/s²

h = 71.3 m

Potential energy of Sean and the parachute at the top of the tower

We replace data in the formula (1)

U = m*g*h

U = (81.4 kg)*(9.8 m/s²)*(71.3 m)

U = 56877.4 N*m

U = 56877.4 J

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In the second figure provided details are given on which are the angles in question, \Delta x is the distance between both rays.
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For violet we have:
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3 years ago
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Answer:

Explanation:

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If the diameter is doubled,

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\Delta t=time of contact of ball with racquet

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F_{racquet}=\frac{80m}{\Delta t}-----1

When it land on the player hand its final velocity becomes zero and time of contact is same as of racquet

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Answer:

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