3 years ago

What are the three components of the equation for the second law of motion?

Physics

1 answer:

noname [10]3 years ago

6 0

force= mass × acceleration

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A girl lifts a 160-N load to a height of 1 m in 0.5 s. How much power is used to lift the load?

12345 [234]

First, find the work done. W = f*d, so 160 N * 1 m = 160 J. Then divide the work by the time to get the power. P = W/t. P = 160 J / 0.5 s = 320 W.
The answer is 320 W. Hope this helps, and have a great day! :)

8 0

3 years ago

A 42.0-kg parachutist is moving straight downward with a speed of 3.85 m/s. (a) If the parachutist comes to rest with constant a

RideAnS [48]

Answer:

-414.96 N

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration

$v^2-u^2=2as\\\Rightarrow a=\frac{v^2-u^2}{2s}\\\Rightarrow a=\frac{0^2-3.85^2}{2\times 0.75}\\\Rightarrow a=-9.88\ m/s^2$

$F=ma\\\Rightarrow F=42\times -9.88\\\Rightarrow F=-414.96\ N$

The force the ground exerts on the parachutist is -414.96 N

If the distance is shorter than 0.75 m then the acceleration will increase causing the force to increase

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3 years ago

Convert 172 to a scientific notation

gtnhenbr [62]

Answer:

1.72×10^2

Explanation:

Is the answer correct ?

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3 years ago

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Which is a correct step in a scientific experiment involving acids and bases?

Gre4nikov [31]

The answer, using an indicator to measure the hydrogen ion concentration of a solution, is correct

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What instrument will be used to measure the volume of a box

Anettt [7]

Answer:

A ruler.

Explanation:

Just measure height, length and width and multiply each.

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