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3 years ago

What is a good example of contact force

1 answer:

5 0

A good example would be kicking a soccer ball, nothing will happen to the ball if you don’t directly apply force to it (through your leg)

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What is the medium when you are in your bedroom listening to the radio?

GrogVix [38]

Answer:

this equation doesn't work

Explanation:

no one listens to radio anymore

8 0

3 years ago

Read 2 more answers

A sailboat starts from rest and accelerates at a rate of 0.21 m/s^2 over a distance of 280 m. find the magnitude of the boat's f

sasho [114]

We use the kinematic equations,

$v=u+at$ (A)

$S= ut + \frac{1}{2} at^2$ (B)

Here, u is initial velocity, v is final velocity, a is acceleration and t is time.

Given, $u=0$ , $a=0.21 \ m/s^2$ and $s= 280 m$ .

Substituting these values in equation (B), we get

$280 \ m = 0 +\frac{1}{2} (0.21 m/s^2) t^2 \\\\ t^2 = \frac{280 \times 2}{0.21 } \\\\ t= 51.63 \ s$ .

Therefore from equation (A),

$v = 0 + (0.21) \times (51.63 s)= 10.84 \ m/s$

Thus, the magnitude of the boat's final velocity is 10.84 m/s and the time taken by boat to travel the distance 280 m is 51.63 s

8 0

3 years ago

Mike is watching a Disney movie with his son Jason Jason likes the movie so much that he becomes excited and stands in front of

shusha [124]

You could put it in two terms.

Rebellion- rebelling, or acting against, someone's orders or actions.

Disobedience- the opposite of obidience; not following the rules; breaking the law.

5 0

3 years ago

How do you find mass, volume and density? Any formulas?

Andrei [34K]

Density=mass/volume. if you know any 2 of these variables, you can figure out the missing one

5 0

3 years ago

Unpolarized light is passed through an optical filter that is oriented in the vertical direction.

VashaNatasha [74]

In order to solve this problem it is necessary to apply the concepts related to intensity and specifically described in Malus's law.

Malus's law warns that

$I = I_0 cos^2\theta$

Where,

$\theta=$ Angle between the analyzer axis and the polarization axis

$I_0 =$ Intensity of the light before passing through the polarizer

The intensity of the beam from the first polarizer is equal to the half of the initial intensity

$I = \frac{I_0}{2}$

Replacing with our the numerical values we get

$I = \frac{46}{2}$

$I = 23W/m^2$

Therefore the intensity of the light that emerges from the filter is $23W/m^2$

5 0

3 years ago