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Delicious77 [7]

4 years ago

12

What does each letter stand for in the formula p=v x i?

1 answer:

Nataly_w [17]4 years ago

6 0

I only know P and V and P is pressure and V is volume

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Help ASAP). Draw additional masses to show how the block can be made to move toward point A. Be sure to draw the string and labe

chubhunter [2.5K]

Answer:

Given that the block have two applied masses 250 g at East and 100 g at South. In order to make a situation in which block moves towards point A, we have to apply minimum number of masses to the blocks. In order to prevent block moving toward East, we have to apply a mass at West, equal to the magnitude of mass at East but opposite in direction. Therefore, mass of 250 g at West is the required additional mass that has to be added. There is already 100 g of mass acting at South, that will attract block towards South or point A. No need to add further mass in North-South direction.

4 0

3 years ago

a 70 kg desk sits on the floor motionless If gravity is pulling it with an acceleration of 9.8 m/s/s how much force is gravity e

adell [148]

Since force is mass*acceleration,

F = 70kg * 9.8 m/s

3 0

4 years ago

An aerobatic airplane pilot experiences weightlessness as she passes over the top of a loop the loop maneuver. The acceleration

Natali5045456 [20]

The radius of the loop is 18.9 km

Explanation:

When the airplane is at the top of the loop, the pilot experiences two forces:

The force of gravity, acting downward, of magnitude $mg$
The normal reaction exerted by the seat on the pilot, also acting downward, N

Since the plane is moving in a circular motion, the net force on the pilot must be equal to the centripetal force, therefore we can write:

$mg+N = m\frac{v^2}{r}$

where

m is the mass of the pilot

$g=9.8 m/s^2$ is the acceleration of gravity

N is the normal reaction

v = 430 m/s is the speed of the plane

r is the radius of the loop

Here we are told that the pilot feel weightless at the top of the loop: this means that the normal reaction is zero,

N = 0

Therefore the equation becomes

$mg=\frac{mv^2}{r}$

And so we can find the radius of the loop:

$r=\frac{v^2}{g}=\frac{430^2}{9.8}=18.9 \cdot 10^3 m = 18.9 km$

Learn more about circular motion:

brainly.com/question/2562955

brainly.com/question/6372960

#LearnwithBrainly

8 0

3 years ago

Where does the focal point of a convex mirror fall?

mina [271]

C)at the vertex of the mirror

4 0

3 years ago

Metabolic power is the rate at which your body "burns" fuel to power your activities. For many activities, your body is roughly

DerKrebs [107]

Answer:

Metabolic power 420.138 W

Explanation:

Given data:

considering drag coefficient Cd = 0.9

Assuming cross section of cyclist A = 0.50 m^2

Take density of air ρ = 1.2 kg/m3

We know that drag force is given as

$Drag\ Force = Cd\times 1/2 \times \rho AV^2
$

$D = 0.9\times 1/2\times 1.2\times 0.5\times 7.3^2
$

D = 14.388 N

$Power = D\times V = 14.388\times 7.3 = 105.03 W$

hence metabolic power is given as

Metabolic power $= \frac{D}{\eta}$

$= \frac{105.03}{0.25}$

= 420.138 W

7 0

3 years ago