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tankabanditka [31]
3 years ago
11

Which of the following best defines force

Physics
1 answer:
vlada-n [284]3 years ago
3 0

The middle one on the list is the correct one.

The first one ... distance divided by time ... is Speed, not force.

The third one ... mass times velocity ... is Momentum, not force.

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A device for exercising the upper leg muscle is shown above, together with a schematic representation of an equivalent lever sys
yuradex [85]

yo mamaaaaaaaaaaaaaaa

4 0
3 years ago
R1=3 ohms
brilliants [131]

Answer: current I = 1.875A

Explanation:

If the resistors are connected in series,

Then the equivalent resistance will be

R = 6 + 18 + 15 + 9

R = 48 ohms

Using ohms law

V = IR

Make current I the subject of formula

I = V/R

I = 90/48

I = 1.875A

And if the resistors are connected in parallel, the equivalent resistance will be

1/R = 1/6 + 1/18 + 1/15 + 1/9

1/R = 0.166 + 0.055 + 0.066 + 0.111

R = 1/0.3999

R = 2.5 ohms

Using ohms law

V = IR

I = 90/2.5

Current I = 35.99A

3 0
3 years ago
Calculate the work done by a 50.0 N force on an object as it moves 9.00 m, if the force is oriented at an angle of 135° from the
aivan3 [116]

Answer:

Work done, W = -318.19 Joules

Explanation:

It is given that,

Force acting on the object, F = 50 N

Distance covered by the force, d = 9 m

Angle between the force and the distance traveled, \theta=135^{\circ}

The work done by an object is equal to the product of force and distance traveled. It is equal to the dot product of force and the distance. Mathematically, it is given by :

W=Fd\ cos\theta

W=50\times 9\times \ cos(135)

W = -318.19 Joules

So, the work done by the force is 318.19 Joules. The work is done in opposite to the direction of motion. Hence, this is the required solution.

7 0
3 years ago
2. 3000. kg car is moving across level ground at 5.0 m/s when it begins an
gizmo_the_mogwai [7]

Answer:

yes

Explanation: Work is done when there is movement. Therefore it was work was being done.

7 0
3 years ago
What is the wavelength of a beam of electromagnetic radiation traveling through a vacuum with a frequency of 6 x 10^11 Hz? The s
victus00 [196]

Answer:

Option D.) 5.0 x 10^-4m

Explanation:

Data obtained from the question include:

f (frequency) = 6 x 10^11 Hz

v (velocity) = 3.00 x 10^8 m/s

λ (wavelength) =?

Using the equation v = λf, the wavelength can be obtained as illustrated below:

v = λf

λ = v/f

λ = 3.00 x 10^8/6 x 10^11

λ = 5 x 10^-4m

Therefore, the wavelength of the beam of the electromagnetic radiation is 5 x 10^-4m

5 0
4 years ago
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