1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
hoa [83]
3 years ago
13

In a real system of levers, wheels, or pulleys, the AMA is less than the IMA because _____.

Physics
1 answer:
pickupchik [31]3 years ago
5 0
In a real system of levers, wheels, or pulleys, the AMA is less than the IMA because of friction. 
AMA (Actual mechanical advantage) is found by dividing output force by effort force. The actual mechanical advantage will always be less than the ideal mechanical advantage. The ideal mechanical advantage assumes perfect efficiency which doesn't account for friction, while actual mechanical advantage does. Therefore; the IMA is always greater than the actual mechanical advantage because all machines must overcome friction. 
You might be interested in
A 3858 N piano is to be pushed up a(n) 3.49 m frictionless plank that makes an angle of 31.6 ◦ with the horizontal. Calculate th
uranmaximum [27]
The work done will be equal to the potential energy of the piano at the final position

P.E=m.g.h

.consider the plank the hypotenuse of the right triangle formed with the ground
.let x be the angle with the ground=31.6°
.h be the side opposite to the angle x (h is the final height of the piano)
.let L be the length of the plank

sinx=opposite side / hypotenuse
= h/L

then h=L.sinx=3.49×sin31.6°=0.638m

weight w=m.g
m=w/g=3858/10=385.8kg

Consider Gravity g=10m/s2

then P.E.=m.g.h=385.8kg×10×0.638=2461.404J

then Work W=P.E.=2451.404J
8 0
2 years ago
Read 2 more answers
Question #10. A rock is white in color, when viewed in sunlight.. In a windowless room, red light is shined on the rock. What co
likoan [24]

We will have the following:

Since it is a white rock, then when in a windowless room with just red light the color that will appear to our eyes is red. Since is the only color to reflect.

5 0
10 months ago
A 2.55 kg block starts from rest on a rough inclined plane that makes an angle of 60 degree with the horizontal. the coefficient
lorasvet [3.4K]

Answer:

Change in mechanical energy = work done by friction

so it is equal to

W = -8.16 J

Explanation:

As we know that change in mechanical energy must be equal to the work done by non conservative forces only

So here when block moves down the inclined plane then the work done by friction force is given as

W = F.d

here we have

F = \mu F_n

here we know that

F_n = mg cos\theta

so we have

F_n = 2.55(9.81)(cos60)

F_n = 12.5 N

Now the friction force on the block is given as

F_f = \mu F_n

F_f = 0.25 \times 12.5

F_f = 3.13 N

now work done by the friction is given as

W = -(3.13)(2.61)

W = -8.16 J

7 0
3 years ago
A 440 kg roller coaster car is going 26 m/s when it reaches the lowest point on the track. If the car started from rest at the t
yaroslaw [1]
34 m I just took the quiz
6 0
3 years ago
Read 2 more answers
a 1000 kg car crashed into bearer . the car changed speed from 30 m/s to 20 m/s in 2 seconds . What force did the bearer apply t
Allushta [10]
The bearer used an opposite force to slow the car.
3 0
3 years ago
Read 2 more answers
Other questions:
  • What is the direction of the net force that acts on an object undergoing uniform circular motion?
    11·2 answers
  • If you could shine a very powerful flashlight beam toward the Moon, estimate the diameter of the beam when it reaches the Moon.
    8·1 answer
  • A complete description of simple harmonic motion must take into account several physical quantities and various mathematical rel
    12·2 answers
  • Ariana is accelerating her car at a rate of 4.6 m/s2 for 10 seconds. Her starting velocity was 0 m/s.
    6·1 answer
  • Which wave characteristics is defined as the number of cycles of a periodic wave occurring per unit time?
    6·1 answer
  • Are the correct? PLEASE HELP ASAP
    10·2 answers
  • 3. An astronaut on a space-walk swings a 0.5 kg metal tool in a circular path at the end of a cable 3.6 m long. The astronaut th
    15·1 answer
  • In establishing standing waves with a Slinky®, your wrist oscillates with f frequency of 4.0 Hz, and the length between any two
    5·1 answer
  • Circuit theroy: Find current in Ix and Iy
    11·1 answer
  • If the pressure in a gas is doubled while its volume is held constant, by what factor do vrms change
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!