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mixer [17]
3 years ago
10

A child does 5.0 J of work on a spring while loading a ball into a spring-loaded toy gun. If mechanical energy is conserved, wha

t will be the kinetic energy of the ball when it leaves the gun?
A 0 J
B 3.7 J
C 2.5 J
D 5.0 J
Physics
1 answer:
sleet_krkn [62]3 years ago
6 0
<h2>Option D is the correct answer.</h2>

Explanation:

Here mechanical energy is conserved.

Kinetic energy + Potential energy = Constant.

First the child does 5.0 J of work on a spring while loading a ball into a spring-loaded toy gun.

      That is potential energy = 5 J

      Kinetic energy = 0 J

      Kinetic energy + Potential energy = 0 + 5 = 5 J  

Secondly the spring is released.

      That is potential energy = 0 J

      Kinetic energy = ?

      Kinetic energy + Potential energy = Constant = 5 J

      Kinetic energy + 0  = 5 J

      Kinetic energy is 5 J

Option D is the correct answer.

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4 years ago
a force of 5.5 n is applied to an object. the moment arm for the force is 0.84 m. what is the torque produced by the force?
Kipish [7]

A force of 5.5N is applied to an object. The moment arm for the force is 0.84 m, the torque produced by the force is <u>4.62N-m</u>.

A force applied perpendicularly to a lever multiplied by its distance from the lever's fulcrum (the length of the lever arm) is its torque. We can find the torque from a force by taking the perpendicular component of that force and multiplying by the magnitude of the R vector where this R vector is the vector that points from the axis to the point where the force is applied.

To calculate torque produced by the force, we have-

Torque= forcexmoment arm

T = fxd

T =5.5Nx0.84m

T=4.62N-m.

To learn more about torque, visit---

brainly.com/question/20691242

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6 0
2 years ago
Can you get your sphere to ever be fully lit (lit on both halves)? If not, why?
BartSMP [9]

Answer:

no

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7 0
3 years ago
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4 0
3 years ago
A baseball is hit into the air with a velocity of 27 m/s. How high does it go?
Marizza181 [45]

Answer:

Explanation:

If a baseball is hit into the air with a velocity of 27 m/s, we want to determine the maximum height of the ball. Using the projecile formula;

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H = 27²/2(9.81)

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3 years ago
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