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3 years ago

Construction, principal and working of electric motor

1 answer:

5 0

A power supply A basic motor has a DC power source, in general. It supplies power for the motor or field coils armature. Field Magnet can be a permanent magnet or electromagnet The magnetic field tends to generate a torque on the spinning armature coil by virtue of Fleming's lefthand rule.

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An automobile is traveling on a long, straight highway at a steady 76.0 mi/h when the driver sees a wreck 180 m ahead. at that i

masha68 [24]

a) The car’s speed just after leaving the icy portion of the road is the first part

We have s = ut + $\frac{1}{2} at^2$

Here s = 130 m, a = -1.2 $m/s^2$ , u = 76 mile/hr = 33.975 m/s

$130 = 0*t - 0.5*(-1.2)*t^2\\ \\ \\ t=14.72 seconds$

After 14.72 seconds cars speed is given by v =u +at

u = 33.975m/s, a = -1.2 $m/s^2$

v = 33.975-1.2*14.72 = 16.31 m/s

So velocity of car on leaving icy surface = 16.31 m/s

b) Time taken after icy surface

0 = 16.31 - 7.10*t

t = 2.23 seconds

Distance traveled during this time

$v^2 = u^2+2as\\ \\ 0 = 16.31^2 - 2*7.10*s\\ \\ s = 18.74 m$

Total distance traveled = 130+18.74 = 148.74 m

c) Total time taken = 14.72+2.23=16.95 seconds

3 0

3 years ago

An airplane flies Minneapolis too Chicago in 74 minutes. If it is 572,000 meters from Minneapolis too Chicago what is the planes

miv72 [106K]

Answer:

128.8m/s

Explanation:

74 × 60 = 4440 convert minutes to seconds

572000/4440 = 128.82882... speed=distance/time

4 0

3 years ago

1. A pumpkin with a mass of 2 kg accelerates 2 m/s/s when an unknown force is applied to it. What is the amount of the force?

Andreyy89

Answer:

<h3>The answer is 4 N</h3>

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 = 2 × 2

We have the final answer as

Hope this helps you

8 0

3 years ago

A cyclist rides at a constant speed of 4. 5 m/s around a curve. If the centripetal acceleration is 29 m/s2, what is the radius o

QveST [7]

Answer:

a = v^2 / R = 4.5^2 / R = 29

R = 4.5^2 / 29 = .70 m

3 0

2 years ago

FORENSIC SCIENCE--

nikklg [1K]

Answer:

D. 90

Explanation:

because even if there is a shadow of doubt the person should not be persecuted as it could lead to false imprisonment

7 0

3 years ago

Construction, principal and working of electric motor​

Construction, principal and working of electric motor