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AURORKA [14]
3 years ago
7

A metal bar has a frictionless axle going through its center of mass. You notice that the bar is not level (flat), but that it i

s tilted at a 30 degree angle (the right end is below the horizontal and the left end is above the horizontal) and that the bar is not rotating away from this orientation. You can say that: a. The net force isn't zero and the net torque is counter-clockwise on the bar b. The net force is zero but the net torque is counter-clockwise in the bar c. The net force is zero bot the net torque is clockwise on the bar d. The net force isn't zero and the net torque is clockwise on the bar e. The net force is zero and the net torque is zero on the bar
Physics
1 answer:
ANTONII [103]3 years ago
5 0

Answer:

yep

Explanation:

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3 years ago
A single loop of wire with an area of 0.0780 m2 is in a uniform magnetic field that has an initial value of 3.80 T, is perpendic
Katarina [22]

Answer:

The induced current is 26.7 mA

Explanation:

Given;

area of the loop, A = 0.078 m²

initial magnetic field, B₁ = 3.8 T

change in the magnetic field strength, dB/dt = 0.24 T/s

The induced emf is calculated as;

emf = - \frac{d \phi}{dt} \\\\emf = -\frac{dB.A}{dt} \\\\emf = A (\frac{dB}{dt} )\\\\emf = 0.078(0.24)\\\\emf = 0.0187 \ V

The resistance of the loop = 0.7 Ω

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4 0
3 years ago
At a particular instant, a hot air balloon is 100 m in the air and descending at a constant speed of 2.0 m/s. at this exact inst
rewona [7]

Answer:

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Find out how long before the ball hits the ground

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find time to hit ground from 100 m  

          ( height will be<u> zero</u> when it hits the ground)

<u>0 </u>=  100  - 2 t  - 1/2 ( 9.81) t^2

        use Quadratic Formula to find t = 4.32 seconds

              horizontal speed of ball = 20 m/s  

in 4.32 seconds it will travel horizontally   20  m/s * 4.32 s = 86.4 m

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