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amid [387]
3 years ago
14

Elias serves a volleyball at a velocity of 16 m/s. The mass of the volleyball is 0.27 kg. What is the height of the volleyball a

bove the gym floor if its total mechanical energy is 41.70 J? Round to the nearest tenth. m
Physics
1 answer:
liberstina [14]3 years ago
6 0

Answer:

The correct answer to the following question will be "2.7 m".

Explanation:

The given values are:

Velocity, v = 16 m/s

mass, m = 0.27 kg

Mechanical energy, M.E = 41.70 J

g = 9.8 m/s²

As we know,

Kinetic energy, K=\frac{mv^2}{2}

Potential energy, U=m.g.h

Now, the total mechanical energy will be:

⇒  \frac{mv^2}{2}+U

⇒  41,71 \ kg.m^2/s^2

Now,

⇒  h=\frac{E-(\frac{mv^2}{2})}{mg}

On putting the estimated values, we get

⇒    =\frac{41.70-(\frac{0.27(16)^2}{2})}{0.27\times 9.8}

⇒    =\frac{41.70-(\frac{0.27\times 256}{2} )}{2.64}

⇒    =\frac{41.70-34.56}{2.64}

⇒    =\frac{7.14}{2.64}

⇒    =2.7 \ m

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D. When a substance reacts with another substance, it shows its chemical property

3 0
3 years ago
2. What is the kinetic energy of a 7.26 kg bowling ball that is rolling at a speed of 2 m/s?
telo118 [61]

Kinetic energy is the energy possessed by an object when that object is moving in space. The higher the mass of an object or higher the speed of an object the higher the kinetic energy will be.

So to calculate the Kinetic Energy we can use the following formula

K.E=(1/2)*m*v^2

Inserting the values in formula gives:

K.E=1/2*7.26*2^2

14.52J

This is the final answer which gives the kinetic energy of the ball.

6 0
3 years ago
Read 2 more answers
Pls help it's due today​
mario62 [17]

Answer:

Breh seriously. Ugh fine.

1.B

2.D

3.C

4.C

5.D,A and B

6.A,C and D

3 0
2 years ago
What mass has a rest energy of 100J?
alexandr1967 [171]

Answer:

option a is correct

Explanation:

<h2>I hope it's help you ❣️❣️</h2>
6 0
3 years ago
To measure the acceleration due to gravity on a distant planet, an astronaut hangs a 0.070-kg ball from the end of a wire. The w
mote1985 [20]

Answer:

g = 1.64m/s²

Explanation:

1.5m in 0.078s

V = 15 / 0.078

= 19.23m/s

Tension = mg

μ = 3.10 × 10⁻⁴

T = V²μ

mg =  V²μ

g =  V²μ / m

g = ((19.23)²(3.10 × 10⁻⁴)) / (0.070)

g = 1.64m/s²

7 0
3 years ago
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