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Usimov [2.4K]
3 years ago
10

John is riding the bus to the next samuell football game. The bus is traveling to the right at 20 m/s and Jon is walking towards

the back (left) of the bus at 5 m/s. What is Jon’s relative velocity to a stationary observer?
Physics
1 answer:
Elenna [48]3 years ago
4 0

Answer:

Vrel_jon's = 15 [m/s] to the right

Explanation:

Relative velocity is defined as the relative motion between two bodies, taking into account the directions of motion.

Relative velocity is defined as the relative motion between two bodies, taking into account the directions of motion. The relative velocity is defined as the algebraic sum of the velocities, if the movements are opposite the vectors are subtracted, as will be done below.

Vrel = 20 - 5 = 15 [m/s]

A person watching Jon sees him moving to the right at a speed of 15 [m/s]

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Motion is
Sladkaya [172]

Answer:

a change of position in relation to another object.

Explanation:

Motion can be defined as a change in the location (position) of a physical object or body with respect to a reference point.

This ultimately implies that, motion would occur as a result of a change in location (position) of an object with respect to a reference point or frame of reference i.e where it was standing before the effect of an external force.

A reference point refers to a location or physical object from which the motion (movement) of another physical object or body can be determined.

Mathematically, the motion of an object is described in terms of acceleration, time, distance, speed, velocity, displacement, position, etc.

Hence, motion is a change of position in relation to another object.

7 0
3 years ago
The Gulf Stream off the east coast of the United States can flow at a rapid 3.3 m/s to the north. A ship in this current has a c
never [62]

Answer:

2.29 m/s

Explanation:

given,

Speed of the stream to north,x = 3.3 m/s

speed of the ship,z = 8 m/s

Speed of the stream is in north direction, to move the ship in west direction ship should move in south direction.

To solve this a right angle triangle is constructed.

where speed of the stream is base and speed of cruise is hypotenuse.

now, speed of ship with respect to ground

z² = x² + y²

y² = z² - x²

y² = 8² - 3.3²

y = \sqrt{53.11}

y = 2.29 m/s

Hence, the speed of the ship with respect to ground is equal to 2.29 m/s.

5 0
3 years ago
A young girl gives her toboggan a push of 4.0m/s uphill. It slides up the hill slowing down at an acceleration of 8.0m/s down. I
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It takes 30 seconds for the whole journey
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3 years ago
How many electrons can possess this set of quantum numbers: principal quantum number n = 4, magnetic quantum number mℓ = −1?
LekaFEV [45]

Answer:

6 electrons

Explanation:

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For the quantum number l which describes the shape of the orbital, we have the possible values : 0 to n-1.

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For the angular quantum number, ml, which tell us the orientation in space,we have the values - l to + l.

So lets determine the number of orbials which can have the values -l for n=4

l = 0   ml = 0

l=  1    ml = -1,0,1

l= 2    ml = -2, -1, 0, 1, 2

l= 3    ml = -3,-2,-1,0,1,2,3

So we have three orbital with ml = - 1 and from Pauli´s exclusion principle we can have up two electrons in each orbital. Thus for n= 4 we can have up to 6 electrons with ml = -1

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3 years ago
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