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3 years ago

If the object represented by the FBD below has a mass of 2.0 kg, what is the

Physics

1 answer:

ycow [4]3 years ago

4 0

Answer: B

Explanation:

Let us first resolve the forces.

Horizontal, the vectorial resolution is equal to zero. Since the positive direction and negative direction vector are of same magnitude. Therefore, summation of horizontal forces Fh = 0

Vertical resolution, the sum of forces will be Fv = 30 - 35 = - 5 N

Resultant force F = sqrt( Fv^2 + Fh^2)

Substitutes Fv and Fh. We get

R = sqrt ( 25) = 5N

We are given that the mass M = 2kg

From Newton second law,

F = Ma

Where a = acceleration

Substitute F and M and make a the subject of formula

5 = 2a

a = 5/2 = 2.5 m/s^2

Therefore, acceleration a of the object is 2.5 m/s^2 down.

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A river flows due south at 5 mi/h. A swimmer attempting to cross the river heads due east swimming at 3 mi/h relative to the wat

Dafna11 [192]

Answer:

<u>velocity of swimmer relative to ground = 3 i -5 j</u>

Explanation:

To cross a river the swimmer swims relative to river in perpendicular direction.

Velocity of river = -5 j (south)

Velocity of swimmer relative to river = 3 i(north)

<h2>Velocity of swimmer relative to ground = Velocity of swimmer relative to river + Velocity of river</h2>

Velocity of swimmer relative to ground = 3 i -5 j

So magnitude of total velocity is $\sqrt{3^2+(-5)^2}$ = $\sqrt{9+25}$ = $\sqrt{34}$

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3 years ago

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Murljashka [212]

Answer:

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Explanation:

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3 years ago

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Amanda [17]

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3 years ago

Write a function to accept a vector of masses (m) from the user and gives the corresponding energy to them. Energy vector is the

jarptica [38.1K]

Answer:

Written in Python

def energyvector(mass):

c = 2.9979 * 10**8

energy = mass * c ** 2

print(round(energy,2))

Explanation:

This line defines the function

def energyvector(mass):

This line initializes the speed of light

c = 2.9979 * 10**8

This line calculates the corresponding energy

energy = mass * c ** 2

This line prints the calculated energy

print(round(energy,2))

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3 years ago

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IgorC [24]

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