Hello
This question is to be tackled using vectors. When we look at the Southwest direction, we know it lies exactly between the South and West directions, producing an angle of 45 degrees. When we take sin(45) and multiply it by the original force, we obtain the component towards West; that is:
60 * sin (45) = 42.4 Newtons
And cos(45) gives us the force towards the South direction; that is:
60 * cos(45) = 42.4 Newtons
This can also be checked by using the formula of the magnitude of a vector and squaring 42.4, adding it to the square of 42.4 and then taking the square root of the answer.
sqrt(42.4^2 + 42.4^2) = sqrt(3600) = 60
Answer: the answer is B
Explanation: I just took the quiz :)
Answer:
- <u>Because in both kind of motions, the position is periodically repeated. Both are simple harmonic motions.</u>
Explanation:
<em>Moving back and forth</em> means that the moving object goes through the same position every time a certain period of time elapses.
The same is true for the <em>circular motion</em>, every time the object completes a turn, the object is in the same position.
They are examples of simple harmonic motions. The time it takes the object to repeat a complete cycle is called period.
Therefore, in a grahp of position versus time, the curve that represents the position repeats itself every so often equal to one period, both for moving back and forth and for moving in a circle.
Answer:
The values of the two resistors are 48 ohms and 12 ohms.
Explanation:
Power (P) = Voltage^2 (V^2) ÷ Resistance (R)
R = V^2 ÷ P
The minimum power drawn by the heater is 300 watts
Voltage is 120 V
R = 120^2 ÷ 300 = 14,400÷300 = 48 ohms
The maximum power drawn by the heater is 1200 watts
R = 120^2 ÷ 1200 = 14,400 ÷ 1200 = 12 ohms