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Dimas [21]
3 years ago
10

A camera weighing 10 N falls from a small drone hovering 20 m overhead and enters free fall. What is the gravitational potential

energy change of the camera from the drone to the ground if you take a reference point of (a) the ground being zero gravitational potential energy? (b) The drone being zero gravitational potential energy? What is the gravitational potential energy of the camera (c) before it falls from the drone and (d) after the camera lands on the ground if the reference point of zero gravitational potential energy is taken to be a second person looking out of a building 30 m from the ground?
Physics
1 answer:
Mashcka [7]3 years ago
3 0

Answer:

A) 200 j

B) 0 J

C) -100 J

D) -300 J

Explanation:

We know that  change in potential energy is given as

\Delta U =  U_f - U_i = mgy_f - mgy_i

where, mg is weight

yf and yi final and initial position

mg = 10 N

yf = 0 m

yi = 20 m

\Delta U = 10\times 20 - 0 = 200 J

B) mg = 10 N

yf =  20 m

yi = 20 m

\Delta U =  0 j

c) before fall from the drone

U = mgh

h  = yf - yi = 20 - 30 = -10 m

U = 10\times (-10) = -100 J

D) point has 0 potential energy

mg = 10 N

h = yf -yi = 0 -30 = - 30 m

U = 10 \times (-30) = -300 J

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A wire is formed into a circle having a diameter of 19.0 cm and placed in a uniform magnetic field of 3.40 mT. The wire carries
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Answer:

Explanation:

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M = 283.38 x 10⁻⁴ x 5

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7 0
3 years ago
When a particular wave is vibrating with a frequency of 4.00 Hz, a transverse wave of wavelength 60 cm is produced. Determine th
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Answer:

Speed = 2.4 m/s

Explanation:

As given in question,

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So, the wavelength of the wave = 0.6 m

speed of wave = wavelength x frequency

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Hence, the velocity of wave vibrating with 4 Hz frequency and wavelength of 60 cm is 2.4 m/s.

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3 years ago
Suppose you take two non-zero displacements represented by vectors A &amp; B.The magnitude of A is 5 m and the magnitude of B is
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Answer:

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Explanation:

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If we have the displacement A and displacement B. The total displacement is A + B. We would end up at the starting point if we take a displacement -(A + B) from point B

b. What is the magnitude of the largest displacement you can end up from the starting point?

The maximum displacement we can obtain is when A and B are in the same direction. So A + B = 5 m + 6 m = 11 m or -A - B = -(A + B) = -11 m.

c. When A and B are perpendicular, what is the component of B in the direction of A?

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So the component of B in A,s direction is Bcos90° = B × 0 = 0 m

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