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Nadya [2.5K]
3 years ago
10

How many 3.2cm paperclips could fit on a football field

Physics
1 answer:
Alenkinab [10]3 years ago
5 0
3429 paperclips because a football field is 120 yards and 120 yards converted to centimeters is 10972.8cm so 10972.8cm divided by 3.2 is 3429.
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A wave has a wavelength of 7 mm and a frequency of 19 hertz. What is its speed?
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Speed = (frequency) x (wavelength)

Speed = (19 per second) x (7 mm)

Speed = (19 x 7) (per second · mm)

<em>Speed = 133 mm/sec</em>

or you might want to write  <em>Speed = 0.133 m/s</em> .

4 0
3 years ago
A 100 kg box sits on an incline held at rest by a very thin rope attached to another mass hanging as shown. The force of frictio
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If friction is acting along the plane upwards

then in this case we will have

For equilibrium of 100 kg box on inclined plane we have

mgsin\theta = F_f + T

also for other side of hanging mass we have

T = Mg = 50(9.8) = 490 N

now we have

100(9.8)sin\theta = 100 + 490

980sin\theta = 590

sin\theta = 0.602

\theta = 37 degree

In other case we can assume that friction will act along the plane downwards

so now in that case we will have

mgsin\theta + F_f = T

also we have

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now we have

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980 sin\theta = 490 - 100

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<em>So the range of angle will be 23.45 degree to 37 degree</em>

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– A man walks 50 meters due west, then 50 meters 60 north of west. Determine the magnitude and direction of the resultant disp
Fynjy0 [20]

Answer:

86.6, 45°

Explanation:

The diagram explains better.

Using vector component method:

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For the first:

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For the second:

B = -50cos(60)i + 50sin(60)j

B = -25i + 43.3j

The resultant vector is :

R = A + B

R = -50i - 25i + 43.3j

R = -75i + 43.3j

The magnitude is:

R = [(-75)² + (43.3)²]^½

R = 86.6m

The angle is

tanθ = (50/50) = 1

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