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Darya [45]
3 years ago
9

A fire woman dropped a person onto the safety net. Right

Physics
1 answer:
dolphi86 [110]3 years ago
7 0

Answer:

m = 28.7[kg]

Explanation:

To solve this problem we must use the definition of kinetic energy, which can be calculated by means of the following equation.

E_{k}=\frac{1}{2}*m*v^{2}\\

where:

Ek = kinetic energy = 1800 [J]

m = mass [kg]

v = 11.2 [m/s]

1800=\frac{1}{2}*m*(11.2)^{2}\\m = 28.7[kg]

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Reliability:-Waste heat is capable of degrading insulation essential to motor operation • Years of service common with proper operation

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8 0
3 years ago
A pitcher throws a baseball towards home plate. The baseball, which has a mass of 142 g, approaches the plate with 128 J of kine
mylen [45]
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Speed or Velocity=?
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128=1/2*142*v^2
128=72*v^2
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by taking square rt 
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so the speed will be 1.333 ms-1
5 0
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