A vector A~ has a negative x component 2.89 units in length and a positive y component 3.17 units in length. The vector A~ can b
1 answer:
Answer:
a1 = -2.89 units
a2 = 3.17 units
magnitude = 4.2896 units
direction = 132.35 degrees
Explanation:
We can write the vector in component form as: <-2.89, 3.17>
That means that its i and j components are:
a1 = -2.89 units
a2 = 3.17 units
The magnitude of the vector is given by:
The vectors direction can be found from the tangent function, ad noticing that the vector must reside on the Second Quadrant:
You might be interested in
Answer:
True b and c
Explanation:
In an RLC circuit the impedance is
examine the different phrases..
a) False. The maximum impedance is the value of the resistance
b) True. Resonance occurs when
(wL)² + (1 / wC)² = 0
w² = 1 / LC
c) True. In resonance the impedance is the resistive part and the power is maximum
d) False. In resonance the inductive and capacitive part cancel each other out
e) False. The impedance is always greater outside of resonance, but at the resonance point they are equal
Answer:
-6112.26 J
Explanation:
The initial kinetic energy, is given by
} where m is the mass of a body and
is the initial velocity
The final kinetic energy, is given by
where
is the final velocity
Change in kinetic energy, is given by
Since the skater finally comes to rest, the final velocity is zero. Substituting 0 for and 12.6 m/s for
and 77 Kg for m we obtain
From work energy theorem, work done by a force is equal to the change in kinetic energy hence for this case work done equals <u>-6112.26 J</u>