Examples of Newton's third law of motion are ubiquitous in everyday life. For example, when you jump, your legs apply a force to the ground, and the ground applies and equal and opposite reaction force that propels you into the air. Engineers apply Newton's third law when designing rockets and other projectile devices.

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A ball is launched from ground level and hits the ground again after an elapsed time of 4 seconds and after traveling a horizont

Mumz [18]

Answer:

a. It is constant the whole time the ball is in free-fall

Explanation:

If we divide the movement on its vertical and horizontal components, and we concentrate on the vertical component, let's call x-component, and analyze Newton's second's law:

$\sum\overrightarrow{F_{x}}=m\overrightarrow{a_{x}}$

with $\sum\overrightarrow{F_{x}}$ , $a_{x}$ the acceleration on horizontal direction and m the mass of the ball, because the only force acting on the object is gravity that is always vertical, there're not forces on the horizontal direction that means $\sum\overrightarrow{F_{x}}=0$ and by (1) that implies $a_{x}$ =0 there's not acceleration on horizontal direction.

Because acceleration is the rate at what velocity changes and there's no acceleration, there's no change in velocity, in other words velocity is constant on horizontal direction.

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B. Add the potential and kinetic energy for each location to find the total energy. What do you notice

ExtremeBDS [4]

Answer: do

Explanation:

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