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nikklg [1K]
3 years ago
13

A man is pushing a heavy crate up an inclined plane (ramp) into the back of semi trailer. What can the man do to make it easier

to get the crate up the ramp?
A) Use gloves.
B) Make the ramp longer.
C) Make the ramp shorter.
D) Pull it instead of push it.
Physics
2 answers:
strojnjashka [21]3 years ago
6 0
Make the ramp longer

sertanlavr [38]3 years ago
5 0
C. Make the ramp shorter
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Explanation:

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As the wavelength of electromagnetic radiation increase
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Two forces act at a point in the plane. The angle between the two forces is given. Find the magnitude of the resultant force. fo
Zielflug [23.3K]

Answer:

408N at 89.89°

Explanation:

This problem requires that we resolve the force vectors into

x- and y

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Finally, we will convert the resultant force into standard form and find the equilibrant.

Resolve into components:

F1x =F1cos 180°= 232(−1)=−232N

F1y=F1sin180°=0N

F2x=F2cos(−140°)=194(−0.766)=−148.6N

F1y=F1sin(−140°)=232(−0.643)=−149.17N

Note the change of the angle used to give the direction of

F2. Standard angles (rotation from thex

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Now, we add the components:

Fx=F1x+F2x=−380.6N

Fy=F1y+F1y=−148.17N

Technically, this is the resultant force. However, it should be changed back into standard form. Here's how:

F=√(Fx)2(Fy)2=√(−380.6)^2(−148.17)^2=408N

θ=tan−1(−148.17−380.6)

=89.89°

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Wave power can be regarded as a reliable source of energy because the ocean currents are always moving.

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The major challenges that face the use of wave power in electricity generation is the unreliability of the waves which leads to uncertainty in the quantity of power generated Also, the wave direction and direction of ocean currents all limit the amount of power generated by this method. However, in spite of challenges, it can be regarded as a reliable source of energy because the ocean currents are always moving.

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