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JulsSmile [24]
2 years ago
14

Alex is taking the high-speed elevator, which travels at a constant speed of 5 m/s to the 43rdfloorbuilding. Sam is stuck making

the same trip in the freight elevator which only travels at a constant speed of 1.5 m/s. Compare the net forces of both.
Physics
1 answer:
Harlamova29_29 [7]2 years ago
3 0

The net force of Alex is greater than net force of Sam.

The given parameters:

  • Alex speed, = 5 m/s
  • Sam speed. = 1.5 m/s

<h3>What is Newton's second law of motion?</h3>
  • Newton's second law of motion states that the force applied to an object is directly proportional to the product of the mass and acceleration of the object.

F = ma

The net force on each person is calculated as follows;

F = ma + mg

F = m(a + g)

Where;

a is acceleration

Acceleration is directly proportional to velocity

Thus, the person with greater speed will have greater net force.

Learn more about scale reading in elevator for upward motion here: brainly.com/question/13530770

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3 0
3 years ago
A stone whirled on a string experiences a centripetal acceleration of 10 m/s². If the string were shortened to half its length (
LUCKY_DIMON [66]

Answer:

a = 80 m/s²

Explanation:

10 = v²/r

a = (2v)²/(r/2)

a = 4v²•(2/r)

a = 8(v²/r)

a = 8(10)

a = 80 m/s²

4 0
3 years ago
What happens to an electromagnetic wave that is stretched or squeezed together in space?
ss7ja [257]
The wavelength and frequency of the wave is altered, resulting in a change in the amount of energy carried.
5 0
3 years ago
On a journey of 600 km, a train was delayed 1 hour and 30 min after having covered 1 4 of the way. To arrive on time at the dest
mars1129 [50]

Answer:

The train travelled 10hours.

Explanation:

Using speed= distance/time ...eq1

Let the time taken by train to cover the journey be t.

Let the speed of train be s

Time= distance/speed ...eq2

Time t =600/s ...eq3

The train is delayed for 1 1/2 hours=3/2 hours

Train increased by 15km/hr.

Train travelled 1/4 of 600k.= 150km.

Speed increased by s + 15 to cover the remaining 450km

t = 150/s + 400/(s + 15) + 3/2 ..eq4

Equating eq3 and 4

600/s= 150/s + 460/(s + 15) + 3/2

450/s = 3/2 + 450/(s + 15)

3s^2 + 45s -13500=0

Solving the quadratic equation

S= -45 +-sqrt(45^2-4(3×13500)/2×3

S= 60 , -75

Hence speed of train is 60km/hr

Using eq 2 distance/speed=time

600/60=10

t= 10hours

5 0
4 years ago
Liquid water at 25°C and 1 bar fills a rigid vessel. If heat is added to the water until its temperature reaches 50°C, what pres
Tcecarenko [31]

Answer:

The developed pressure is 205.75 bar.

Explanation:

Given that,

Temperature of water =25°C = 273+25 = 298 K

Pressure = 1 bar

Increases temperature = 50°C = 273+50 = 323 K

Value of \beta = 36.2\times10^{-5}\ K^{-1}

Value of k=4.42\times10^{-5}\ bar^{-1}

Specific volume of liquid = 1.0030 cm³/g

We need to calculate the final pressure

Using formula for constant volume change

\beta(T_{2}-T)_{1})-k(P_{2}-P_{1})=0

Put the value into the formula

36.2\times10^{-5}(323-298)-4.42\times10^{-5}(P_{2}-1)=0

P_{2}=\dfrac{36.2\times10^{-5}(323-298)}{4.42\times10^{-5}}+1

P_{2}=205.75\ bar

Hence, The developed pressure is 205.75 bar.

5 0
3 years ago
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