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Umnica [9.8K]
3 years ago
7

A Scooter with a mass of 50 kilograms travels with a speed of 10 meters per second. A 2 Nt force bring it to a halt. How long ti

me the force was acting.
Physics
1 answer:
Serga [27]3 years ago
3 0

Answer:

250s

Explanation:

Given parameters:

Mass  = 50kg

Speed  = 10m/s

Force  = 2N

Unknown:

Time the force was acting  = ?

Solution:

To solve this problem, we use the equation of motion from the second law of Newton:

            Ft  = mV

F is the force

t is the time taken

m is the mass

V is the velocity

          2  x t  = 50 x 10

               t  = 250s

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At 96° F the saturation density of air is 0.04 kg/m3. If the weather report says the relative humidity is 90 % when the tempera
nalin [4]

Answer:

The value is  H  =  0.036 \ kg/m^3

Explanation:

From the question we are told that

   The saturation density of air is \rho =  0.04 \ kg/m^3

   The temperature for this saturation density to occur  T_s  =  96^o F

    The relative humidity at this temperature is  R_h  =  90\%  =  0.90

Generally the relative humidity is mathematically represented as

      R_H  = \frac{H}{\rho}

Here H represents humidity

=> 0.90 =  \frac{H}{0.04}

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=>  H  =  0.036 \ kg/m^3

8 0
3 years ago
A child weighing 200 N is being held back in a swing by a horizontal force of 125 N, as shown in the image. What is the tension
mixer [17]

Answer:

75

Explanation:

i am not sure but if 200N boy is being held back then the force that's holding him back must be equal to or greater than his weight. if 125N is already exerted then the tension will be:

T=200-125

= 75

8 0
3 years ago
Types of problems are generated by resource extraction and usage?
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Extraction of resources costs money.

Problems with usage: for example, coal, when burned, it produces pollution.
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How fast does water flow from a hole at the bottom of a very wide, 3.2 m deep storage tank filled with water
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Answer:

the velocity of the water flow is 7.92 m/s

Explanation:

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Here we use the Bernouli equation

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We simply applied the above formula so that the correct value could come

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