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Lelu [443]
3 years ago
8

John walks 1.00 km north, then turns right and walks 1.00 km east. His speed is 1.50 m/s during the entire stroll.a) What is the

magnitude of his displacement, from beginning to end?b) If Jane starts at the same time and place as John, but walks in a straight line to the endpoint of John's stroll, at what speed should she walk to arrive at the endpoint just when John does?
Physics
1 answer:
avanturin [10]3 years ago
3 0

Answer:

(a) 1.414 km

(b) 1.06 m/s

Explanation:

(a) For John:

Distance = 1 km north and then 1 km east

Speed = 1.5 m/s

total distance traveled = 1 + 1 = 2 km = 2000 m

Time taken to travel = Distance / speed

t = 2000 / 1.5 = 1333.3 seconds

Displacement = \sqrt{1^{2}+1^{2}}=1.414 km

(b) For jane :

Time is same as john = 1333.33 second

Distance = 1.414 km = 1414 m

Speed = distance / time = 1414 / 1333.33 = 1.06 m/s

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A 3.7-kg object is acted on by two forces. One of the forces is 11 N acting toward the
vitfil [10]

Answer:

F₂ = -7.3 N

Explanation:

Given that,

The mass of an object, m₁ = 3.7 kg

First force, F₁ = 11 N

The net acceleration of the object is 1 m/s².

We know that,

F₁+F₂ = ma

11+F₂ = (3.7)(1)

F₂ = 3.7-11

F₂ = -7.3 N

so, the other force is 7.3 N and it is acting in west direction.

7 0
3 years ago
Help please!
Talja [164]

The correct expression for the maximum speed of the object during its motion is \frac{FT}{m}.

<h3>Maximum speed of the object</h3>

The maximum speed of the object is determined using the following formulas;

v(max) = Aω

where;

  • A is the amplitude of the motion
  • ω is angular speed

The maximum speed of the object can also be obtained from the maximum net force on the object,

F = ma

where;

  • F is the maximum net force
  • a is the acceleration
  • m is mass of the object

F = m(v/t)

mv = Ft

v = Ft/m

Thus, the correct expression for the maximum speed of the object during its motion is \frac{FT}{m}.

Learn more about maximum speed here: brainly.com/question/4931057

3 0
2 years ago
A magnet falls through a loop of wire with the south pole entering first. After it has fallen all the way through the wire loop
Alisiya [41]

Answer:

The induced current direction as viewed is clockwise

Explanation:

Lenz's Law states that the induced e. m. f. causes current to be driven in the loop of wire in such a way as to generate magnetic field that are oppose the magnetic flux change which is the source of the induced current

Therefore, as the magnet approaches the coil with the south pole,  the coil produces current equivalent to the upward movement of the south pole of a permanent magnet through it which according to Flemings Right Hand Rule is clockwise

Therefore;

The direction of the induced current in the loop (as viewed from above, looking down the magnet) is clockwise

5 0
3 years ago
Why does the speed of an object change when a force acts on it?
Crazy boy [7]
It changes because force is somewhat like pressure. Force is continuously against the object so as a result, speed changes .
7 0
3 years ago
If the gas mileage of a Honda Civic car is 38 miles per gallon how many liters of gasoline would the car use to move from the Es
Troyanec [42]

Answer:

<em>6.25</em>

Explanation:

 M = d/g........................ Equation 1

making g the subject of the equation,

g = d/M............................. Equation 2

Where M = mileage per gallon, d = distance move from Essex campus to Catonsville campus,  g = amount of gasoline used

<em>Given: M = 38 miles per gallon, d = 37.2 km</em>

<em>If 1 kilometer =  0.62 miles</em>

<em>Then, 37.2 km = 37.2×0.62 miles = 23.064 miles</em>

<em>Substituting these values into equation 2,</em>

<em>g = 38/23.064</em>

<em>g = 1.648 gallon</em>

<em>g ≈1.65 gallon</em>

<em>Thus, </em>

<em>If,     0.264 gallon = 1 liters.</em>

<em>Then, 1.65 gallon = 1.65×1/0.264 = 6.25 liters.</em>

<em>g = 6.25</em>

<em>Thus the car will use 6.25 liters of gasoline to move from the Essex campus to the Catonsville campus.</em>

8 0
3 years ago
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