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ASHA 777 [7]
3 years ago
13

An electrical motor spins at a constant 2662.0 rpm. If the armature radius is 6.725 cm, what is the acceleration of the edge of

the rotor? O 524,200 m/s O 29.30 m/s O292.7 m/s O 5226 m/s2
Physics
1 answer:
Gemiola [76]3 years ago
3 0

Answer:

18.73 m/s^2

Explanation:

f = 2662 rpm = 2662 / 60 rps

r = 6.725 cm = 0.06725 m

Acceleration, a = r w

a = r x 2 x pi x F

a = 0.06725 × 2 × 3.14 × 2662 / 60

a = 18.73 m/s^2

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Mass and weight are the same in<br> meaning and unit.<br><br> true or false
schepotkina [342]

Answer:

False.

Explanation:

Mass is how much space an object takes up, while weight is how light or heavy an object is.

4 0
3 years ago
Could someone answer this please?
Harman [31]

Answer: The answer is B!

Explanation:

8 0
3 years ago
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A jet plane flying 600 m/s experience an acceleration of 4.0 g when pulling out of a circular dive. What is the radius of curvat
aksik [14]

Answer:

Option C

Solution:

As per the question:

Velocity of the jet, v = 600 m/s

Acceleration, a = 4.0 g

Now,

To calculate the radius of curvature:

The necessary centripetal force on the jet is given by the force:

F = F_{c}                                               (1)

where

F_{c} = \frac{mv^{2}}{R} = centripetal force

where

m = mass of the jet

R = radius of curvature of the path

Using eqn (1):

ma = \frac{mv^{2}}{R}

Thus

a = \frac{v^{2}}{R}

4.0 g = \frac{600^{2}}{R}

where

g = acceleration due to gravity = 9.8\ m/s^{2}

4.0\times 9.8 = \frac{600^{2}}{R}

R = \frac{600^{2}}{4.0\times 9.8}

R = 9183.67 m ≈ 9200 m

3 0
3 years ago
I need help! Please! This is big dumb. And I am feeling big dumb<br> Will mark brainiest!
Vladimir [108]

Please don't run yourself down !  You are not dumb !  You are a school-boy, using a computer, to access the Internet, implement duplex digital communication, and answer a question on Sir Isaac Newton's laws of motion.  I'm pretty sure that your parents and grandparents could never do most of that !  

Now I'll SHOW you that you're only overthinking this.  If you didn't practically INVITE it to scare you, it couldn't do that.

The question is:   When you push a 0.65 kg ball with 125 Newtons of force, what is the ball's acceleration ?  

That's the question. You have no idea how to get acceleration out of mass and force.  You kinda remember that there was some kinda formula to calculate it with, but there's no chance that you remember the formula.

Now SIT UP in your chair, turn off your phone and the music, LOOK at the problem, READ it, and ALLOW your BRAIN to warm up.

READ the first line.  It says USE THIS FORMULA .  What are the letters in the formula ?  

-- ' a ' ... that's acceleration; that's what you have to find.  

-- ' F ' ... that's Force; you know it; it's 125 Newtons.

-- ' m ' ... that's mass; you know it; it's 0.65 kg .

What would happen if you write 125 in place of the 'F', write 0.65 in place of the 'm', and divide them because it's written in a fraction ?  You'd get a single number.  Then the formula would say ' acceleration = the number '.

Would it be the correct number for acceleration ?  I don't know. But who cares ! The problem says "Use this formula". So the right answer is whatever number you get when you use this formula.

It so happens that the formula IS the correct one, because it comes from Newton's second law of motion; eventually, you'll need to know this.  But right now, to answer the question and solve the problem, all you have to do it USE THIS FORMULA, and see if the number you get is one of the choices.  

Don't overthink these things. They can't scare you if you don't let them.

4 0
3 years ago
Read 2 more answers
A 150 g ball is thrown towards a wall with a speed of 6.5 m/s. If bounces off the wall with a speed of 3.5 m/s, determine the im
Jet001 [13]

Answer:1500Ns

Explanation:

Mass(m)=150g

Initial velocity(u)=-6.5m/s

Final velocity(v)=3.5m/s

Impulse=change in momentum

Change in momentum=m(v-u)

Change in momentum=150(3.5-(-6.5))

Change in momentum=150(3.5+6.5)

Change in momentum=150(10)

Change in momentum=1500Ns

4 0
3 years ago
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