3 years ago

Identify the parts of the wave below. Please help! I need it quite soon!

Physics

1 answer:

dimulka [17.4K]3 years ago

4 0

A. wavelength
<span>B. Amplitude
The others I am not sure about

</span>

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(mass of the elevator, kg) x (9.8 m/s²) x (9.0 m) Joules .

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Which formula can be used to find the magnitude of the resultant vector? R2 = Rx2 + Ry2 R = Rx + Ry R = Rx(cosθ) R = Rx(sinθ)

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$\Delta U_g=m.g.h_f-m.g.h_i\\\Delta U_g=49kg*9.8m/s^2*(0m-11m)\\\Delta U_g=-5.3kJ$

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the initial kinetic energy is zero because the motion started from rest, so:

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applying the conservation of energy theorem:

$U_g-W_f=K_f\\W_f=-(\Delta K+\Delta U)\\W_F=5.3kJ-0.27kJ\\W_F=-5.0kJ$

The work done by the friction force is given by:

$W_f=F_f.h.cos(\theta)\\$

the angle of the force is 180 degrees because it's against the movement:

$F_f=\frac{W_f}{h.cos(\theta)}\\\\F_f=\frac{-5.0kJ}{11m.cos(180^o)}\\\\F_f=0.45kN$

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Answer: I have no idea either i need help aswell

Explanation:

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make me brainliestt :))

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