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
Leviafan [203]
3 years ago
5

Two electric motors drive two elevators of equal mass in a three-story building 10 meters tall. each elevator has a mass of 1,00

0 kg. the second elevator takes 10 seconds to do this work. calculate the power output of the second motor.
Physics
2 answers:
Licemer1 [7]3 years ago
7 0
<span>The power output is calculated by multiplying the weight of the elevator (1000 kg) by g (9.8 m/s^2) and by the distance (10 m), then dividing the product by the time (10 s). Thus, the power output of the second motor is 9800 watts.</span>
Maslowich3 years ago
5 0

Answer: The correct answer is 9800 Watt.

Explanation:

In the given problem, work done is equal to the potential energy.

The expression for the power output in the case of electric motor is as follows;

P=\frac{mgh}{t}                                                      ....... (1)

here, m is the mass of the object, g is the acceleration due to gravity, h is the height and t is the time taken.

Calculate the power output of the second motor by using equation (1).

Put m= 1000 kg, g= 9.8 meter per second square, h= 10 m and t= 10 s.

P=\frac{(1000)(9.8)(10)}{10}

P=9800 Watt

Therefore, the power output of the second motor is 9800 Watt.

You might be interested in
What is its maximum altitude above the ground? The answer is the maximum height above the ground
Kisachek [45]

Answer:

Maximum altitude above the ground = 1,540,224 m = 1540.2 km

Explanation:

Using the equations of motion

u = initial velocity of the projectile = 5.5 km/s = 5500 m/s

v = final velocity of the projectile at maximum height reached = 0 m/s

g = acceleration due to gravity = (GM/R²) (from the gravitational law)

g = (6.674 × 10⁻¹¹ × 5.97 × 10²⁴)/(6370000²)

g = -9.82 m/s² (minus because of the direction in which it is directed)

y = vertical distance covered by the projectile = ?

v² = u² + 2gy

0² = 5500² + 2(-9.82)(y)

19.64y = 5500²

y = 1,540,224 m = 1540.2 km

Hope this Helps!!!

3 0
3 years ago
A train travels 79 kilometers in 2 hours, and then 77 kilometers in 3 hours. What is its average speed?
koban [17]
Average speed=total distance traveled/time. Total distance=the sum of the two short distances=79*2+77*3=389 km. Total time used to travel is 2+3=5 hr. Average speed is 389/5=77.8 km/hr.
4 0
3 years ago
In one cycle, a heat engine takes in 1000 J of heat from a high-temperature reservoir, releases 600 J of heat to a lower-tempera
Talja [164]

Answer:

η = 40 %  

Explanation:

Given that

Qa ,Heat addition= 1000  J

Qr,Heat rejection= 600 J

Work done ,W= 400 J

We know that ,efficiency of a engine given as

\eta=\dfrac{W(net)}{Q(heat\ addition)}

Now by putting the values in the above equation ,then we get

\eta=\dfrac{400}{1000}

η = 0.4

The efficiency in percentage is given as

η = 0.4  x 100 %

η = 40 %

Therefore the answer will be 40%.

4 0
3 years ago
A 4.44 l container holds 15.4 g of oxygen at 22.55°c. what is the pressure?
padilas [110]
We will use the ideal gas equation:
PV = nRT, where n is moles and equal to mass / Mr
P = mRT/MrV
P = 15.4 x 8.314 x (22.55 + 273) / 32 x 4.44
P = 266.3 kPa
5 0
3 years ago
Describe and name the different types of collision. In which are the linear momentum and kinetic energy conserved
ipn [44]

Answer:

1. Elastic collision

2. Inelastic collision    

Explanation:

Elastic collision: collision is said to be elastic if total kinetic energy is not conserved and if there is a rebound after collision

the collision is described by the equation bellow

m1U1+ m2U2= m1V1+m2V2

Inelastic collision: this type of collision occurs when the total kinetic energy of a body is conserved or when the bodies sticks together and move with a common velocity

the collision is described by the equation bellow

m1U1+ m2U2= V(m1+m2)

8 0
3 years ago
Other questions:
  • In EXACTLY 13 words explain how global warming happens on Earth.
    15·1 answer
  • Which of the following supports the theory of continental drift?
    9·1 answer
  • A miniature light bulb with resistance of 3 ohms is connected to a 6-volt source. How much current will flow through the bulb?
    6·1 answer
  • If the temperature of a volume of ideal gas increases for 100°C to 200°C, what happens to the average kinetic energy of the mole
    11·1 answer
  • Which of the following should maintain the appropriate temperature and humidity levels and provide closed-loop recirculating: a.
    7·1 answer
  • A charge Q accumulates on the hollow metallic dome, of radius R, of a Van de Graaff generator. A probe measures the electric fie
    7·2 answers
  • Two car horns are sounded creating two sound waves with frequencies that differ by a factor of three. How does the speed of the
    10·1 answer
  • Which statement is true?
    10·1 answer
  • Are moons 1-4 waxing are waning ?
    12·1 answer
  • A hiker walks 11 km due north from camp and then turns and walks due east. The
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!