The analysis of ac circuits uses a rotating vector called a

Physics

1 answer:

vlada-n [284]3 years ago

6 0

Answer:

Phasor

Explanation:

A phasor is usually referred to as a rotating vector which has scaled lines. A vector quantity is one which has both magnitude and direction.

Since a phasor is also a vector quantity it has the magnitude and direction in the form of quantity and displacement. The quantity and displacement are usually measured in a counterclockwise direction.

Phasors is used in the engineering world to establish relationships between AC quantities and the parameters such as current and voltage etc.

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The balls velocity started at 20m/s and increased to 40 m/s in 3 seconds. What was the

Gnoma [55]

Answer:

$a = \frac{20}{3} \frac{m}{s {}^{2} }$

Explanation:

The formula for velocity is:

$v = vo - a \times t$

Where

$vo$

is the ball's initial velocity.

solving for a:

$40 = 20 + a \times t \\ 20 = a \times t \\ 20 = 3a \\ a = \frac{20}{3}$

6 0

3 years ago

An overnight rainstorm has caused a major roadblock. Three massive rocks of mass m1=528 kg, m2=838 kg and m3=311 kg have blocked

JulsSmile [24]

Answer:

$FA=419,25N$

$F12=287,25N$

Explanation:

The bulldozer is moving the rocks as one system, the weigth for the complete system is:

$M=m1+m2+m3=1677kg$

From newton´s second law the acceleration can be related to the force by:

$FA=m*a=1677kg*0,250m/s^{2}=419,25N$

on the middle rock we have the force F12 from the first to the middle rock on the direction of movement and F32 from the las rock to the middle rock on the opposite direction of movement.

For the last rock to accelerate at the same rate it must be subjected to a force:

$F23=m3*a=311kg*0,250m/s^{2} =77,75N$