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3 years ago

What is the IMA of the following pulley system? 1 2 3 4

Physics

2 answers:

mr_godi [17]3 years ago

4 0

The answer is 2

I did this question today on my Odyssey ware, and I believe the explanation is that each supporting rope increases the IMA by 1

Katyanochek1 [597]3 years ago

3 0

Answer:

IMA of pulley system is 3

Explanation:

The full form of IMA is ideal mechanical advantage. It is also defined as the ratio of output force to the input force. The mathematical expression is given by :

$IMA=\dfrac{F_r}{F_e}$

For the pulley system, the IMA is equal to the number of ropes present in the pulley - mass system. So, it is quite easy to find IMA of the pulley i.e. just counting the number of ropes present in the system.

In the given figure, there are three ropes in the system. Hence, its IMA is 3.

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A truck is hauling a 300-kg log out of a ditch using a winch attached to the back of the truck. Knowing the winch applies a cons

Pie

Answer:

0.128 s

Explanation:

We have to start by calculating the net force acting on the log. We have two forces:

- The constant pulling force, forward, of F = 2500 N

- The frictional force, backward

The frictional force is given by

$F_f = \mu mg$

where

$\mu=0.45$ is the coefficient of friction

m = 300 kg is the mass of the log

$g=9.8 m/s^2$ is the acceleration of gravity

Substituting,

$F_f = (0.45)(300)(9.8)=1323 N$

So the net force acting on the log is

$F=2500 - 1323=1177 N$

Now, we can find the acceleration of the log by using Newton's second law

$F=ma$

where a is the acceleration. Re-arranging for a,

$a=\frac{F}{m}=\frac{1177}{300}=3.92 m/s^2$

And finally we can find the time it takes for the log to reach a speed of

v = 0.5 m/s

by using the suvat equation:

$v=u+at$

where u = 0 is the initial speed and t the time. Solving for t,

$t=\frac{v}{a}=\frac{0.5}{3.92}=0.128 s$

5 0

4 years ago

Describe the relationship between amperage, voltage, and, as well as resstance.

Nikolay [14]

Answer:

$I=\frac{V}{R}$

Explanation:

Ohms law says that the current in the conductor between the two points is directly related or directly proportional to the voltage by keeping a proportionality of constant which is called resistance.

Mathematically Ohms law can be written as,

$I=\frac{V}{R}$

Here, I is the current measure in ampere or amperage, V is voltage measure in voltage and R is resistance measure in Ohm.

Now the relation between the amperage, voltage and resistance will be,

$I=\frac{V}{R}$

Amperage=Voltage/Resistance

5 0

3 years ago

Which of the following is an example of biological weathering

7nadin3 [17]

An example of biological weathering is the widening of gaps in rocks caused by tree roots since pressure or stress is exerted on the rocks due to the growing plant roots. The pressure is exerted by a biological process (i.e., growing roots), even though the process is physical.

Plants and animals and its action speeds up mechanical and or chemical weathering, which in turn causes biological weathering.

<span>With the help of the chemicals that are produced by the tiniest bacteria, algae and liches, the rocks which they live in are also broken down by them in order to get the nutrients they need.</span>

3 0

4 years ago

Which arrow best represents the direction in which friction acts on the ball at point P?

Anna [14]

Answer:

Arrow (2)

Explanation:

Friction is a force due to the contact between the external surfaces of an object and the molecules of the medium in which the object is travelling through. In this particular case, friction is due to the molecules of air, which hit the arrow and slow it down. For this reason, friction is always directed in the opposite direction to the motion of the object: in this case, we see that the ball at point P is travelling in the right-upward direction, so friction acts in the left-downward direction, so it must be option (2).

7 0

3 years ago

Read 2 more answers

If you were to mix 3 liters of 20 degrees celsius water with 4 liters of 30 degrees water at 7 liters of water what temperature

Debora [2.8K]

Lets say final temperature is @ celsius
3c(@-20)= 4c([email protected])
[email protected]=180
@=180/7

3 0

4 years ago