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3 years ago

You walk with a velocity of 2 m/s north. You see a man approaching you, and from your frame of

Physics

1 answer:

solong [7]3 years ago

8 0

Answer:

The velocity of the man from the frame of reference of a stationary observer is, V₂ = 5 m/s

Explanation:

Given,

Your velocity, V₁ = 2 m/

The velocity of the person, V₂ =?

The velocity of the person relative to you, V₂₁ = 3 m/s

According to the relative velocity of two

V₂₁ = V₂ -V₁

∴ V₂ = V₂₁ + V₁

On substitution

V₂ = 3 + 2

= 5 m/s

Hence, the velocity of the man from the frame of reference of a stationary observe is, V₂ = 5 m/s

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We can model a pine tree in the forest as having a compact canopy at the top of a relatively bare trunk. Wind blowing on the top

frez [133]

We need to consider for this exercise the concept Drag Force and Torque. The equation of Drag force is

$F_D = c_D A \frac{\rho V^2}{2}$

Where,

F_D = Drag Force

$c_D$ = Drag coefficient

A = Area

$\rho$ = Density

V = Velocity

Our values are given by,

$c_D = 0.5$ (That is proper of a cone-shape)

$A = 9m^2$

$\rho = 1.2Kg/m^3$

$V = 6.5m/s$

Part A ) Replacing our values,

$F_D = 0.5*9*\frac{1.2*6.5^2}{2}$

$F_D = 114.075N$

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$\tau = F*d$

$\tau = (114.075N)(7)$

$\tau = 798.525N.m$

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3 years ago

a 3.2 kg durian fruit is pushed across the table.If the acceleration of the durian is 3.1 m/s/s to the right,what is the net for

Gala2k [10]

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 3.2 × 3.1

We have the final answer as

Hope this helps you

4 0

3 years ago

Read 2 more answers

In the equation for final velocity with average acceleration, the final velocity is equal to the _____ velocity plus the product

Dominik [7]

INITIAL,INITIAL,INITIAL,INITIAL,

4 0

3 years ago

Which energy does the water flow into the river?

kupik [55]

The water in a reservoir behind a hydropower dam is another example of potential energy. The stored energy in the reservoir is converted into kinetic energy (motion) as the water flows down a large pipe called a penstock and spins a turbine.

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4 years ago

A particular circular track on level ground has a circumference of 400 m. a walker, traveling counterclockwise and starting at t

Sidana [21]

Answer:

Average speed: 0.5 m/s. Average velocity: 0

Explanation:

Average speed is given by:

$v=\frac{d}{t}$

where

d is the total distance covered (the length, of one lap of the track, so d = 400 m)

t is the time taken to cover that distance (so, t = 800 s)

Substituting,

$v=\frac{400}{800}=0.5 m/s$

Instead, average velocity is defined as

$v=\frac{d}{t}$

where this time,

d is the displacement, which is the vector connecting the starting point to the final point of the motion

t is still the time taken (800 s)

However, in this case the walker starts and finishes his trip at the same point: therefore, the displacement is zero (d=0), and this means that the average velocity is zero as well.

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3 years ago