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
Scilla [17]
4 years ago
9

Calculate the power of the elevator if it can raise 290 kg of mass 30 flights of stairs (300 m) in 17 seconds

Physics
1 answer:
Advocard [28]4 years ago
5 0

Answer:

Power =  50204 [watts]

Explanation:

We know that the power is defined by the following expression:

Power = Work/time

where:

Power [watts]

time [seconds]

The work done will be the following:

Work = Force * distance [Joules]

Force[Newtons]

distance[meters]

Force = mass* gravity

Force=290 [kg]*9.81[m/s^2] =2844.9[N]

Work = 2844.9[N]*300[m] = 853470[J]

Therefore

Power = 853470 / 17 = 50204 [watts]

You might be interested in
What solutes do not dissolve well in water?
hammer [34]

Answer:

Many substances do not dissolve in water and that is because they are non-polar and do not interact well with water molecules. A common example is oil and water. Oil contains molecules that are non-polar, thus they do not dissolve in water.

Explanation:

6 0
3 years ago
Read 2 more answers
What force must the worker exert to get the box moving & what force must the worker exert to accelerate the box at 0.1 meter
photoshop1234 [79]

Since static friction is the minimum force required to just start the motion of a stationary object.

Here if we need to start an object from rest then we required F = 700 N

So for the first part of the above problem Force will be F = 700 N

Now if the box is already moving then we will have to use kinetic friction force between box and floor

now we can write the equation of net force as

F - F_k = m*a

here

F_k = kinetic friction = 220 N

m = mass = 500 kg

a = acceleration = 0.1 m/s^2

now we will have

F - 220 = 500* 0.1

F = 220 + 50 = 270 N

3 0
3 years ago
Convection currents in this layer drive the tectonic plates above them.
Sphinxa [80]

Hello, hello? Hey! Hey, wow, day 4. I knew you could do it.

Uh, hey, listen, I may not be around to send you a message tomorrow. *banging* It's-It's been a bad night here for me. Um, I-I'm kinda glad that I recorded my messages for you *clears throat* uh, when I did.

Uh, hey, do me a favor. *banging* Maybe sometime, uh, you could check inside those suits in the back room? *banging* I'm gonna to try to hold out until someone checks. Maybe it won’t be so bad. *bang bang* Uh, I-I-I-I always wondered what was in all those empty heads back there. *chime plays*.

You know...*deep moan* oh, no - *noises followed by a loud screech and static*

Explanation:

7 0
3 years ago
sound of thunder is heard 5s after the flash of lighting is seen. calculate the distance of nearest point of lighting if the spe
Karolina [17]

Answer:

formula

speed = distance / time

distance = speed x time

distance = 346 x 5

distance = 1730 m

The distance of the lightening strike would be 1730 m or 1.7 km

Explanation:

6 0
3 years ago
Read 2 more answers
What do you think is the main idea?
Tanzania [10]

I think the main idea is that the middle planets have a solid inner core and that they all could have life on them

3 0
3 years ago
Other questions:
  • Descriptive investigations involve collecting data about a system, but not making observations .
    12·2 answers
  • The maximum pressure achieved during ventricular contraction is called
    13·2 answers
  • A man is lifting a piano that weighs 800 N through a distance of 10 meters using a pulley system. The man pulls the rope a total
    15·1 answer
  • The neutron is located in the what part of the atom?
    5·2 answers
  • Are any rocks that form from another rock as a result of change in blank or blank
    5·1 answer
  • Sonia O'Sullivan of Ireland set the World Record in 1994 for the Women's 1000 m race with a time of 2 minutes and 45 seconds. Wh
    8·2 answers
  • Which one of the following statements contain a simile?
    10·2 answers
  • Samples of different materials, A and B, have the same mass, but the sample
    14·1 answer
  • Two male rabbits live in a habitat together. They both compete for mates and territory during the spring months. This is an exam
    14·2 answers
  • what would the net force be on the box in the problems shown below.( both force and direction).​ for all four diagrams. please e
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!