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
vladimir2022 [97]
2 years ago
9

Anyone knows this? Please answer... Spam will be reported.

Physics
1 answer:
Yakvenalex [24]2 years ago
6 0

Answer:

The correct option is;

The assertion is correct, but reason wrong

Explanation:

The question is with regards to the relationship between work, energy, power, and velocity

The mass of each of the persons running up the staircase = Different

The time it takes each person to run up the stairs = Equal time

Let, 'm₁' and 'm₂' represent the mass of each of the persons that ran up the stairs and m₁ > m₂

Let 't' represent the equal time it takes then to run up the stairs

Let 'h' represent the height of the stairs

The energy, 'E', it takes to run up the stairs is equal to the potential energy, P.E., obtained at the top of the stairs

P.E. = m·g·h

Where;

m = The mass of the person at an elevated height

g = The acceleration due to gravity = Constant

h = The height reached above ground level

Given that the height reached is the same for both of the persons, we have

For m₁, P.E.₁ = m₁·g·h and for m₂, P.E.₂ = m₂·g·h

Therefore, where, m₁ > m₂, we have;

P.E.₁ > P.E.₂

∴ E₁ > E₂

Power, 'P', is the rate at which energy is expended

∴ Power, P = E/t

∴ P₁ = E₁/t  > P₂ = E₂/t

Therefore, the person with the greater mass, 'm₁', uses more power than the person of mass 'm₂', in running up the stairs

Therefore, the assertion is correct

The average velocity, vₐ = (Total distance traveled, d)/(Total time taken, t)

Given that the distance, 'd', covered in running up the stairs by both persons is the same, and the time it takes them to complete the distance, 't', is also the same, we have;

The average velocity of the person with the greater mass m₁ is the same as the average velocity of the person with mass, m₂

Therefore, the reason is wrong

The answer is that the assertion is correct, but reason wrong

You might be interested in
7. How much work is done in moving a charge of 10 micro coulombs 1 meter along an equipotential of 10 volts?
Neko [114]

It takes work to push charge through a change of potential. 
There's no change of potential along an equipotential path,
so that path doesn't require any work.

8 0
3 years ago
Read 2 more answers
What 4 things affect how great the change in temperature for a substance is?
yawa3891 [41]

Explanation:

The heat Q transferred to cause a temperature change depends on the magnitude of the temperature change, the mass of the system, and the substance and phase involved.

7 0
3 years ago
Read 2 more answers
A characteristic common to waves is that they
inn [45]
This is mr day and infact am seeing this… come into my office after class.
5 0
2 years ago
When the angle of incidence equals the angle of reflection it is called the law of ​
Reptile [31]

The law of reflection

6 0
3 years ago
Read 2 more answers
A man weighing 750 n and a woman weighing 500 n have the same momentum. what is the ratio of the man's kinetic energy km to that
miss Akunina [59]
Because weight W = M g, the ratio of weights equals the ratio of masses.

(M_m g)/ (M_w g) = [ (p^2 Man )/ (2 K_man)] / [ (p^2 Woman )/ (2 K_woman)

but p's are equal, so

K_m/K_m = (M_w g)/(M_m g) = W_woman / W_man = 450/680 = 0.662
4 0
3 years ago
Other questions:
  • the mass of a brick is 4 kg, find the mass of water displaced by it when completely immersed in water.​
    6·1 answer
  • The rings of Saturn occupy the region inside Saturn's Roche limit.
    15·1 answer
  • Heat engines use heat to do work. true or false.
    15·2 answers
  • To measure specific heat, the student flows air with a velocity of 20 m/s and a temperature of 25C perpendicular to the length
    14·1 answer
  • When the burner in a hot air balloon is turned on, the temperature of the air in the balloon ________ causing its volume to ____
    14·2 answers
  • A car starts moving after waiting for a traffic light to turn green. It is able to travel a distance of 300 meters in 10 seconds
    14·2 answers
  • . Reem took a wire of length 10 cm. Her friend Nain took a wire of 5 cm of the same material and thickness both of them connecte
    5·1 answer
  • Earth's magnetic compass and its effect on birds?
    14·1 answer
  • An object is 10 cm away from a plane mirror. How far is the object from its image.​
    12·1 answer
  • Calculate the volume of material whose density is 0.798gcm-3 and a mass 25g
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!