A.) All the vector quanties have magnitude(strength) as well as direction. Since force is a vector quantity, it has both strength as well direction.

7 0

3 years ago

Whenever the net force on a moving object is zero its acceleration is

adell [148]

We only need to look at Newton's 2nd law of motion:

Net force = (mass) x (acceleration)

If the net force on an object is zero, then either its mass or its acceleration must be zero. If it's called an "object", then its mass isn't zero, so its acceleration is zero.

5 0

3 years ago

A vertical beam of power intensity P (in Watts/m2 ) passes downward through a particular substance. The rate at which P decrease

Mashcka [7]

Answer:

x = 1162.5 W/m²

Explanation:

Since, the power decrease is proportional to the depth of the beam. Therefore, interpolation can be used to find the intensity of power at a depth of 1.25 m. First we calculate the slope from know points:

$Slope = \frac{\Delta y}{\Delta x} \\\\Slope = \frac{(1500 - 3000)\ W/m^{2}}{(2 - 0)\ m} \\\\Slope = -750\ W/m$

Now, we can find the unknown value by using this slope:

$Slope = -750\ W/m = \frac{(600 - x)\ W/m^{2}}{(2 - 1.25)\ m}\\\\(-750\ W/m)(0.75\ m) = (600 - x)\ W/m^{2}\\x = 600\ W/m^{2} + 562.5\ W/m^{2}\\$

<u>x = 1162.5 W/m² (Power intensity at depth of 1.25 m)</u>

5 0

2 years ago