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2 years ago

50 BP

Physics

1 answer:

solong [7]2 years ago

3 0

Because of chicken wing also because the United staes had many fights with

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An electric motor exerts a constant torque of 10 Nm on a grindstone mounted on its shaft. The moment of inertia of the grindston

Dmitry_Shevchenko [17]

Answer:

Angular acceleration = 5 rad /s ^2

Kinetic energy = 0.391 J

Work done = 0.391 J

P =6.25 W

Explanation:

The torque is given as moment of inertia × angular acceleration

angular acceleration = torque/ moment of inertia

= 10/2= 5 rad/ s^2

The kinetic energy is = 1/2 Iw^2

w = angular acceleration/time

=5/8= 0.625 rad /s

1/2 × 2× 0.625^2

=0.391 J

The work done is equal to the kinetic energy of the motor at this time

W= 0.391 J

The average power is = torque × angular speed

= 10× 0.625

P = 6.25 W

6 0

3 years ago

a 0.13 kg stopper is attched to a 0.93 m length of string. the stopper is swung in.a horizontal circle making one revolution in

Crazy boy [7]

The speed of the stopper is 4.95 m/s, while the centripetal force on the stopper and the tension in the string is 3.42N each.

The mass of the stopper is 0.13 Kg, the length of the string to which it is attached is 0.93 m. The stopper swung and made one revolution in 1.18 seconds, so the time period of revolution of the stopper is 1.18 seconds.

The relation between the time period and the angular speed is,

T = 2π/W

W is angular speed and T is the time period of revolution.

Putting values,

1.18 = 2π/W

W = 5.32 rad/s.

The speed of the stopper can be found as,

v = rW

r is the length of the string,

V = 4.95 m/s.

The centripetal force on the stopper is given by,

F = MV²/r

Putting values,

F = 0.13 x 4.95 x 4.95/0.93

F = 3.42 N.

The tension in the string will be equal to the centripetal force on the stopper, so, the tension is 3.

42 N.

To know more about centripetal force, visit,

brainly.com/question/20905151

#SPJ4

8 0

1 year ago

What impulse occurs when a cart that is originally at rest experiences an average force of

frez [133]

Explanation:

What impulse occurs when a cart that is originally at rest experiences an average force of

N for 2.5 s? *

(10 Points)

25 N

25 Nm

25 Ns

25 kg m/s

5 0

3 years ago

A triangle has sidesof length 12cm 16cm and 21 cm determine the 3 angles contained in a triangle

Deffense [45]

Angles will probably be 96° 35° and 49°
I tried to explain it with the working out, just re arrange the cosine rule for angles instead of side lengths.
if you need it explaining at all just message me :)
hoped it helped