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gizmo_the_mogwai [7]
3 years ago
12

A 9.00 kg mass is moving to the right with a velocity of 14.0 m/s. A 12.0kg mass is moving to the left with a velocity of 5.00 m

/s. Assuming that these two balls have a head on collision and stick together, what will be the final velocity of the combination?
Physics
2 answers:
Lena [83]3 years ago
6 0
(9)(14)+(12)(-5) = (9+12)v
126  - 60 = 21v \\ 61 = 21v \\v = 2.90|
r-ruslan [8.4K]3 years ago
5 0

Answer:

3.143 m/s

Explanation:

m1 = 9 kg

u1 = 14 m/s

m2 = 12 kg

u2 = - 5 m/s

Let the velocity after the collision is V

By using the principle of conservation of momentum

Momentum of two bodies before collision = momentum of two bodies after collision

m1 x u1 + m2 x u2 = (m1 + m2) x V

9 x 14 - 12 x 5 = (9 + 12) x V

126 - 60 = 21 x V

V = 3.143 m/s

Thus, the velocity of the sticked bodies after the collision is given by 3.143 m/s.

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Answer:

8.854 pF

Explanation:

side of plate = 0.1 m ,

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V' = 1 kV = 1000 V

Let K be the dielectric constant.

So, V' = V / K

K = V / V' = 5000 / 1000 = 5

C = ε0 A / d = 8.854 x 10^-12 x 0.1 x 0.1 / 0.01 = 8.854 x 10^-12 F

C = 8.854 pF

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4 years ago
How long must it take for a communications satellite to make one complete orbit around the earth? (such an orbit is said to be g
vitfil [10]

The time period of the communications satellites must be 24 hours to make one complete orbit around the earth.

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A communications satellite is a man-made spacecraft that uses a transponder to relay and amplify radio telecommunication signals. It establishes a channel of communication between a source transmitter and a receiver situated at various points on Earth.

Most satellites that orbit the Earth do so between 160 and 2,000 kilometers above the surface. Because of how closely the satellites are orbiting the Earth, this orbital regime is known as low Earth orbit or LEO. The normal orbital period for satellites in low Earth orbit (LEO) is between 90 and 2 hours.

To know more about communications satellite refer to:  brainly.com/question/14524425

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5 0
2 years ago
An green hoop with mass mh = 2.8 kg and radius rh = 0.13 m hangs from a string that goes over a blue solid disk pulley with mass
Otrada [13]
The only force on the system is the mass of the hoop F net = 2.8kg*9.81m/s^2 = 27.468 N The mass equal of the rolling sphere is found by: the sphere rotates around the contact point with the table. 
So by applying the theorem of parallel axes, the moment of inertia of the sphere is computed by:I = 2/5*mR^2 for rotation about the center of mass + mR^2 for the distance of the axis of rotation from the center of mass of the sphere. 
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7 0
4 years ago
A copper wire 12 cm long and a mass of 16 g is in a magnetic field of 1.2 T oriented perpendicular to the wire. What current wou
Ugo [173]

Answer:

Current, I = 1.08 A

Explanation:

Given that,

Length of the copper wire, l = 12 cm = 0.12 m

Mass of the wire, m = 16 g = 0.016 kg

Magnetic field, B = 1.2 T

The magnetic field is oriented perpendicular to the wire. We need to find the current in the wire.

Magnetic force, F = BIL

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I=\dfrac{mg}{BL}

I=\dfrac{0.016\times 9.8}{1.2\times 0.12}

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So, the current through the wire is 1.08 A. Hence, this is the required solution.

8 0
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Differentiate can you help me plzzzzzzz​
Schach [20]

Explanation:

Acceleration and the other term are the same physical phenomenon - just with opposite affects. Acceleration increases velocity, while the other term that begins with the letter "R" reduces.

***(Brainly's language filter is blocking the use of the second term in my answer.)***

Acceleration is defined as the rate of change of the velocity of an object per unit of time...

a = \frac{dv}{dt}

Acceleration would be a POSITIVE (+) quantity, while the r-word would be negative (-).

4 0
3 years ago
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