3 years ago

Estimate the net force needed to accelerate a 1000-kg car at 3m/s/s from rest.

Physics

1 answer:

romanna [79]3 years ago

8 0

Answer:

First Blank. 30,000

Second Blank. 12,000

Third Blank. 20.0

Explanation:

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Answer:

r = 2.55 m

Explanation:

Given that,

First charge, q₁ = 32.2 μC

Second charge, q₂ = + 12.3 μC

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$F=k\dfrac{q_1q_2}{r^2}\\\\r=\sqrt{\dfrac{kq_1q_2}{F}} \\\\r=\sqrt{\dfrac{9\times 10^9\times 32.2\times 10^{-6}\times 12.3\times 10^{-6}}{0.544}} \\\\r=2.55\ m$

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3 years ago

The angular velocity of a process control motor is (13−12t2) rad/s, where t is in seconds. Part A At what time does the motor re

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Answer:

Explanation:

Given

$\omega =13-\frac{1}{2}\cdot t^2$

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(b)

$\frac{\mathrm{d} \theta }{\mathrm{d} t}=\omega$

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$\int d\theta =\int_{0}^{t}(13-.05t^2)dt$

$\theta =(13t-0.1667\times t^3)_0^{5.1}$

$\theta =44.192^{\circ}$

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3 years ago