3. Convert 588 km/hr to m/s.

If she returned home by the same path 7 h 30 min after she left, what were her average speed and velocity in km/h for the entire

pentagon [3]

Answer:

speed v = 0.148 m / s

velocity v = 0

Explanation:

In this exercise we must be careful that the speed is a scalar and the speed is a vector, let's start by looking for the speed

v = Δx /Δt

the distance traveled is x = 2d and the time taken is

t = 7h 30 min

let's reduce to seconds

t = 7 h 3600s / 1h + 30 min 60s / 1min = 27000 s

so the speed is

v = 2d / 27000

to finish the calculation suppose a distance traveled d = 2000 m

v = 2 2000/27000

v = 0.148 m / s

this is the raides which is the speed module

Velocity is a vector,

v = Dx / Dt

in this case the displacement is

Dx = d -d

Dx = 0

the total displacement is zero since it returns to the starting point, consequently the velocity is zero

v = 0

bold is a vector

3 0

3 years ago

A telephone pole has three cables pulling as shown from above, with F⃗ 1=(300.0iˆ+500.0jˆ) , F⃗ 2=−200.0iˆ , and F⃗ 3=−800.0jˆ .

Ray Of Light [21]

A) Net force in component form: $F=100.0i-300.0j$

B) Magnitude of the net force: 316.2, direction: $-71.6^{\circ}$

Explanation:

A)

The three forces given in this problem are:

$F_1=300i+500j$

$F_2=-200i$

$F_3=-800 j$

The three forces are given in component form, where the components with unit vector i is the component along the x-direction, while the components with unit vector j is the component along the y-direction.

In order to find the net force in component form, we just need to add the components of the three forces along each direction. Therefore:

- Along the x-direction:

$F_x = F_{1x}+F_{2x}+F_{3x}=300+(-200)+0=100$

- Along the y-direction:

$F_y=F_{1y}+F_{2y}+F_{3y}=500+0+(-800)=-300$

So, the net force in component form is

$F=100.0i-300.0j$

B)

The magnitude of a vector F is given by Pythagorean's theorem:

$|F|=\sqrt{F_x^2+F_y^2}$

where in this problem,

$F_x=100$ is the x-component

$F_y=-300$ is the y-component

Substituting,

$|F|=\sqrt{(100)^2+(-300)^2}=316.2$

The direction instead is given by

$\theta=tan^{-1}(\frac{F_y}{F_x})=tan^{-1}(\frac{-300}{100})=-71.6^{\circ}$

where the negative sign means the direction is below the positive x-axis.

Learn more about vector addition:

brainly.com/question/4945130

brainly.com/question/5892298

#LearnwithBrainly

8 0

3 years ago

IF U ANSWER I WILL PUT U AS BRAINIEST ANSWER AND GIVE U A THANK U

Bingel [31]

At the Earth's surface, warm air expands and rises, creating
what is known as an area of low pressure.

Cold air is dense and sinks to the surface to create what is
known as an area of high pressure.

8 0

4 years ago

Read 2 more answers

If you are over-driving your headlights and you see an object ahead, you will_____. be given the right-of-way from other vehicle

SashulF [63]

Answer: not be able to stop in time to miss the object

Explanation:

The phrase "Over-driving your headlights" means that a person is driving at such a speed that the vehicle's stopping distance is greater than the maximum viewable distance with the headlights on.

When this occurs, it will be impossible for the vehicle to stop moving in time to avoid an object viewed by the driver in the range of his headlights.

This is a dangerous driving practice and can be avoided by driving at reduced speeds.

5 0

4 years ago

A 1200 kg truck is moving to the right at the speed of 30 m/s. It hit another identical truck that was at rest. The two trucks s

Marrrta [24]

Answer:

ok wht is the question

Explanation:

4 0

3 years ago

3. Convert 588 km/hr to m/s.​

3. Convert 588 km/hr to m/s.