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3 years ago

How is force proportional to mass?

Physics

1 answer:

sukhopar [10]3 years ago

8 0

Answer:

a = F / m

Explanation:

force same -> mass variable

more mass -> less force

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2. A race car starts at 400 m/s and then stops in 20 seconds. Calculate acceleration. Acceleration=final velocity - initial velo

Nostrana [21]

It is -20m/s2
400-0
————- = -20
20

5 0

3 years ago

A child slides down the water slide at a swimming pool and enters the water at a final speed of 4.22 m/s. At what final speed wo

zheka24 [161]

Answer:

v'=5.97 m/s

Explanation:

If the friction and fluid friction are ignored, then by law of conservation of mechanical energy, potential energy at the top of the slide must be equal to the kinetic energy at the bottom of the slide. Thus, the height of slide and final speed at the bottom of the slide are related as:

$mgh = \frac {1}{2} mv^2\\v =\sqrt{2gh}$

let the final speed be v' when h' = 2 h

$\frac{v'}{v}=\frac{\sqrt h'}{\sqrt h}\\v'=\sqrt{\frac{2h}{h}}\times v\\v'=\sqrt2 v\\v'=5.97 m/s$

8 0

3 years ago

In an electroplating process, copper (ionic charge +2e, atomic weight 63.6 g/mol) is deposited using a current of 10.0 A. What m

statuscvo [17]

Answer:

1.974 g

Explanation:

Electrochemical equivalent of copper, z = 0.000329 g/C

I = 10 A

t = 10 minutes = 10 x 60 = 600 seconds

By the use of Farady's law of electrolysis

m = z I t

m = 0.000329 x 10 x 600

m = 1.974 g

5 0

3 years ago

If the light rays in the incident ray originate at 20º from the surface...

Ainat [17]

Given :

The light rays in the incident ray originate at 20º from the surface.

To Find :

The angle for the incident ray.

Solution :

We know angle of incidence is measured from perpendicular to the surface .

So,

$\theta_i = 90^o - 20^o\\\\\theta_i = 70^o$

Now, we know by law of reflection :

Angle of reflection = Angle of incident

$\theta_r = 70^o$

Therefore, the angle of incident and reflection is 70° each.

5 0

3 years ago

1) An object is hung using a metal spring. If now a current is passed through the spring, what will happen to this system?

son4ous [18]

Answer:

D) The spring will contract, raising the weight.

Explanation:

According to the statement there is current that will enter the current through the metal ions that it has in its stratum. The passage of the current will generate within the spring a magnetic field that travels in a loop. That is, while the upper part of the spring which is also that of the spring acts as a north pole, the lower part of the spring and the magnetic field will act as the south pole. The position of the poles will generate an opposition effect that will generate an attraction to each other which will generate a contraction in the spring and an increase in weight on it.

6 0

4 years ago