Physics College

write two differences between practical machine and ideal machine​

Answers

Answer 1

Answer:

Ideal machines are said to have parts which are weightless , frictionless and strings if any are inextensible. Practical machines have parts which have weights, friction and it causes some loss of work done. So these are the differences between Ideal Machine and Practical Machines.

Related Questions

State the two laws of electromagnetic induction, and state them.​

Answers

First law: Whenever a conductor is placed in a varying magnetic field, EMF induces and this emf is called an induced emf and if the conductor is a closed circuit than the induced current flows through it. Second law: The magnitude of the induced EMF is equal to the rate of change of flux linkages.

Example of optical object​

Answers

Answer:

Telescope,cameras

Hope it helped

Telescopes&cameras//

Which of the following is certain to change as a ball
accelerates?
A mass of the ball
B inertia of the ball
C velocity of the ball
Dforce acting on the ball occasionally

Answers

Answer:

C. Velocity of the ball

Explanation:

This is because as the acceleration of the ball increases, there will be an increase in the velocity rate and decrease in the time.

See the formula,

a=m/s²

A car accelerates from rest to 100 m/s in 20 s. What is its acceleration?

Answers

initial velocity=0m/s=uFinal velocity=v=100m/sTime=t=20s

[tex]\\ \sf\longmapsto Acceleration=\dfrac{v-u}{t}[/tex]

[tex]\\ \sf\longmapsto Acceleration=\dfrac{100-0}{20}[/tex]

[tex]\\ \sf\longmapsto Acceleration=\dfrac{100}{20}[/tex]

[tex]\\ \sf\longmapsto Acceleration=5m/s^2[/tex]

Answer:

[tex]initial \: velocity \: = 0 \\ final \: velocity \: 100 \frac{m}{s} \\ time = 20 \\ here \: we \: want \: to \: find \: accelaration \\ accelaration \: = \frac{final \: velocity - initial \: velocity}{time} \\ accelaration \: = \frac{100 - 0}{20} = \frac{100}{20} = 5 \frac{m}{ {s}^{2} } \\ thank \: you[/tex]

1.020 please help!!

Mark brainliest

Answers

Answer:

0.0035 mg

Explanation:

1 mcg = 1e-3 mg

》35 mcg = 35×10^-3 mg

= 0.0035 mg

The primary coil of a transformer has 2650 volts and a current of 66 A. What current is in the secondary coil if it has 4700
volts?*
12 =
A
*Round your answer to the nearest thousandth if necessary.

Answers

Answer:

117.06 A

Explanation:

V = IR

2650 = 66(R)

2650/66 = R

40.15 = R

V = IR

4700 = I(40.15)

4700/40.15 = I

117.06 = I

a car is traveling north. can its acceleration vector ever Point South? explain​

Answers

Yes.

The acceleration vector WILL point south when the car is slowing down while traveling north

When a car is traveling north, its acceleration vector can point south when it is slowing down.

A vector quantity has both magnitude and direction. The direction of a vector is always shown by the direction to which the arrow points.

If the car is travelling north, the direction of the acceleration vector will continue to point northwards.

However, when the car slows down, the direction of the accelerating vector will now point southwards.

Learn more: https://brainly.com/question/12550364

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