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Setler [38]
4 years ago
12

A railroad freight yard switch engine on a straight track travels 1000.m to the end of the track ,then back 600. m ,then forward

300.m. a . What is the switch engine's final displacement from its starting position ? b. How far did it travel?
Physics
1 answer:
Kay [80]4 years ago
4 0
It’s final displacement is 700 meter and it traveled 1900 meter, please hit the thanks button
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a 91.5 kg football player running east at 3.73 m/s tackles a 63.5 kg player running east at 3.09 m/s. what is their velocity aft
Lesechka [4]

The final velocity is 3.47 m/s east

Explanation:

We can solve this problem by using the law of conservation of momentum. In fact, the total momentum of the two players before and after the collision must be conserved:

p_i = p_f\\m_1 u_1 + m_2 u_2 = (m_1+m_2)v

where:

m_1 = 91.5 kg is the mass of the first player

u_1 = 3.73 m/s is the initial velocity of the first player (we take east as positive direction)

m_2 = 63.5 kg is the mass of the second player

u_2 = 3.09 m/s is the initial velocity of the second player

v is their final combined velocity after the collision

Re-arranging the equation and substituting the values, we find:

v = \frac{m_1 u_1+m_2 u_2}{m_1+m_2}=\frac{(91.5)(3.73)+(63.5)(3.09)}{91.5+63.5}=3.47 m/s

So, their velocity afterwards is 3.47 m/s east.

Learn more about momentum:

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6 0
3 years ago
During the Moment of Inertia experiment, a group of students decided to mount a solid sphere on the top of the horizontal disk.
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Answer:

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8 0
3 years ago
What do we mean by the interstellar medium?
Sphinxa [80]
<h2>Answer:</h2>

The <u>interstellar medium</u> is the content of matter and energy that exists between stars within a galaxy.

In this sense, two components can be distinguished in the interstellar medium: dust particles and gas.

Dust represents 1% of the interstellar medium in mass, while the gas (consisting mainly of hydrogen and helium) represents 99% of the mass of the interstellar medium.

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3 0
3 years ago
A satellite is orbiting earth at a distance of 35.0 kilometers. The satellite has a mass of 500 kilograms. What is the force bet
Alika [10]

Answer:

F = 4856.32 N

Explanation:

Given,

A satellite is orbiting earth at a distance from Earth surface, h = 35000 m

The mass of the satellite, m = 500 Kg

The radius of the Earth, R = 6.371 x 10⁶ m

The mass of the Earth, M = 5.972 x 10²⁴ Kg

The gravitational constant, G = 6.67408 x 10 ⁻¹¹ m³ kg⁻¹ s⁻²

The force between the Earth and the satellite is given by the formula

                                    F = GMm/(R+h)²  N

Substituting the values in the above equation

        F = (6.67408 x 10 ⁻¹¹ X 5.972 x 10²⁴ X 500) / (6.371 x 10⁶ + 35000)²

                                        = 4856.32 N

Hence,  the force between the planet and the satellite is, F = 4856.32 N

5 0
3 years ago
The Chandra X-ray observatory is BEST equipped to search for which types of stars? Select all that apply.
Papessa [141]
The right answer for the question that is being asked and shown above is that: "A. neutron; B. red giants; C. black holes; E. main sequence." The Chandra X-ray observatory is BEST equipped to search for neutron, red giants, black holes, <span>main sequence.</span>
3 0
4 years ago
Read 2 more answers
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