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4 years ago

Please help me quick! Please

Mathematics

2 answers:

vampirchik [111]4 years ago

7 0

(-1,-7) ;
7(-1) - 5(-7) = -7 + 35 = 28 .....TRUE

(7,9) ;
7(7) - 5(9) = 49 - 45 = 4 .....FALSE

(4,10) ;
7(4) - 5(10) = 28 - 50 = - 22 .....FALSE

(-6,-14) ;
7(-6) - 5(-14) = -42 + 70 = 28 .....TRUE

answer
(-1,-7) and (-6,-14)

Luda [366]4 years ago

6 0

First one ...................

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Annette [7]

Answer:

Both

Kinetic energy is 25 joule

Potential energy is 784.8 joule

Step-by-step explanation:

Given : A 2-kg bowling ball rolls at a speed of 5 m/s on the roof of the building that is 40 tall.

To find : Is it KE or GPE or Both

Solution :

Mass of the ball - 2 kg

Velocity of the ball - 5 m/s

Height - 40 tall

Both the energy is applied on the object.

1) Kinetic energy (KE)

Formula to find KE is $KE=\frac{1}{2}mv^2$

$KE=\frac{1}{2}(2)(5)^2$

$KE=25$

Kinetic energy is 25 joule.

2) Potential energy (GPE)

Formula to find GPE is $PE=mgh$

g is the acceleration due to gravity, $g=9.81 m/s^2$

$PE=(2)(9.81)(40)$

$PE=784.8$

Potential energy is 784.8 joule.

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Step-by-step explanation:

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