The work output of a machine divided by the work input is the ____ of the machine.

1 answer:

7 0

<span>The work output of a machine divided by the work input is the "Efficiency" of the machine.

Hope this helps!</span>

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a rocket with a mass of 4kg accelerates up from the ground at a rate of 20ft m/s^2, what is the drag force acting on the rocket

Maru [420]

The drag force acting on the rocket is 80N.

<h3>Give an explanation of drag force?</h3>

The divergence in velocity between the fluid and the item, also known as drag, exerts a force on it. Between the liquid and the solid object, there should be motion. Drag is absent in the absence of motion.

The air molecules are more compressed (pushed together) on the surfaces that are facing the front while being more dispersed (spread out) on the surfaces facing the back. Turbulent flow, which occurs when air layers split from the surface and start to swirl, is what causes this.

The drag force acting on the rocket F = ma

Given,

m = 4kg, a = 20ftm/s²

Substituting m and a values in the above formula,

The drag force acting on the rocket F = 4×20

The drag force acting on the rocket F = 80N.

To know more about drag force visit:

brainly.com/question/15144984

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8 0

2 years ago

What concept or principle best explains why

andreev551 [17]

Answer:

d. Newton's first law

I hope this helps you

5 0

3 years ago

A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 3.00 s for the

Vladimir [108]

Answer:

Initial velocity = $29.43m/s$ b) Height it reaches = 44.145 m

Explanation:

Using the first equation of motion we have

$v=u+at$

here

v is the final velocity

u is the initial velocity

a is the acceleration of the object

t is time

When the ball reaches it's highest point it's velocity will become 0 as it will travel no further

Also the acceleration in our case is acceleration due to gravity ( $-9.8m/s^{2}$ ) as the ball moves in it's influence alone with '-' indicating downward direction