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muminat
3 years ago
11

What is power the quotient of?

Physics
2 answers:
loris [4]3 years ago
5 0

Answer:

Power the quotient of work and time.

Explanation:

Power is the quotient of work and time. It is also defined as the rate at which any work is done. Work done is equal to the product of force and the displacement. The mathematical formula of power is given by :

P=\dfrac{W}{t}

The SI unit in which power is measured is watts. It is equivalent to Joules per second.Hence, the correct option is (a).

andrey2020 [161]3 years ago
4 0
Power is equal to work divided by time
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Rina8888 [55]

Here As we can see the figure that the end of the rope is pulled by some force F

Now as we can see that Piano is connected by a pulley which is passing over the pulley so effectively net force on the piano upwards will be 2F as it is connected by 2 ropes by the pulley

Now for constant velocity of the piano we will say

2F - mg = ma

since velocity is constant so acceleration must be ZERO

so here we have

2F - mg = 0

as we know here that

mg = 1000 N

so we will have

2F - 1000 = 0

F = 500 N

so here force must be 500 N

5 0
4 years ago
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What is the definition of Newton and could you leave an example of it too?
vichka [17]
What is the definition of newton
7 0
3 years ago
Alberta is going to have dinner at her grandmother's house, but she is running a bit behind schedule. As she gets onto the highw
viktelen [127]

Complete Question

Alberta is going to have dinner at her grandmother's house, but she is running a bit behind schedule. As she gets onto the highway, she knows that she must exit the highway within 55 min if she is not going to arrive late. Her exit is 43 mi away. How much time would it take at the posted 60 mph speed?

Answer:

The time it would take at the given speed is  x = 43.00 \ minutes

Explanation:

From the question we are told that

      The time taken to exist the highway is  t = 55 min

      The distance to the exist is  d =  43\  mi

       Alberta speed is v =  60 mph

The time it would take travelling at the given speed is mathematically represented as

        t_z = \frac{d}{v}

  substituting values

        t_z = \frac{43}{60}

        t_z = 0.71667\ hrs

Converting to minutes

         1  hour =  60 minutes

So      0.71667 hours = x minutes

   Therefore

               x = 0.71667 * 60

                x = 43.00 \ minutes

5 0
3 years ago
The angular speed of an automobile engine is increased at a constant rate from 1120 rev/min to 2560 rev/min in 13.8 s. (a) What
Neko [114]

Complete Question

The angular speed of an automobile engine is increased at a constant rate from 1120 rev/min to 2560 rev/min in 13.8 s.

(a) What is its angular acceleration in revolutions per minute-squared

(b) How many revolutions does the engine make during this 20 s interval?

rev

Answer:

a

 \alpha = 6261 \  rev/minutes^2

b

 \theta  = 613 \ revolutions

Explanation:

From the question we are told that

   The initial  angular speed is w_i =  1120 \ rev/minutes

    The angular speed after t = 13.8 s = \frac{13.8}{60 }  = 0.23 \ minutes  is w_f = 2560 \ rev/minutes

    The time for revolution considered is t_r =  20 \ s  =  \frac{20}{60} = 0.333 \  minutes  

 Generally the angular acceleration is mathematically represented as

         \alpha = \frac{w_f - w_i }{t}

=>      \alpha = \frac{2560  - 1120 }{0.23}  

=>      \alpha = 6261 \  rev/minutes^2

Generally the number of revolution made is t_r =  20 \ s  =  \frac{20}{60} = 0.333 \  minutes  is mathematically represented as

           \theta  =  \frac{1}{2}  * (w_i + w_f)*  t

=>      \theta  =  \frac{1}{2}  * (1120+ 2560 )*  0.333

=>      \theta  = 613 \ revolutions

5 0
3 years ago
A 12 Volt lead-acid car battery, engineered for "up to 500 or more charge/discharge cycles," has a rating of 95.0 Ampere-hours.
Lena [83]

Answer:

Explanation:

Electrical energy = potential x charge

potential = 12V ,

Charge = 95 amp-hours

= 95 x 60 x 60 coulomb

= 342000 coulomb

Electrical energy stored in battery  = 342000 x 12

= 4104000 J

= 4.1 x 10⁶ J .

6 0
3 years ago
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