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
ExtremeBDS [4]
3 years ago
10

A car with a mass of 1140 kg is traveling in a mountainous area with a constant speed of 71.8 km/h. The road is horizontal and f

lat at point A, horizontal and curved at points B and C. The radii of curvatures at B and C are: rB = 160 m and rC = 125 m. Calculate the normal force exerted by the road on the car at point A. Tries 0/20 Now calculate the normal force exerted by the road on the car at point B. Tries 0/20 And finally calculate the normal force exerted by the road on the car at point C.
Physics
1 answer:
Alinara [238K]3 years ago
4 0

Answer:

point A  N = 11172 N , point B  N = 13486 N  and point C  N = 14801 N

Explanation:

Let's use Newton's second law on the Y axis, where the car is in equilibrium

a) Horizontal and flat road

Point A

     N -w = 0

     N = W = mg

     N = 1140 9.18

     N = 11172 N

b) Horizontal and curved road

In this case, when applying Newton's second law, we have centripetal acceleration, due to the curve

     N -W = m a

     a = v² / R

     N = mg + m v² / R

     N = m (g + v² / R)

Point B

     Rb = 160 m

We reduce the speed to SI units

     V = 71.8 km / h (1000m / 1km) (1h / 3600s) = 19.95 m / s

     N = 1140 (9.8 + 19.95²/160)

     N = 1140 11.83

     N = 13486 N

B point

Rb = 125 m

     N = 1140 (9.8 + 19.95²/125)

     N = 1140 (12.98)

     N = 14801 N

the curve is assumed 90º

You might be interested in
which characteristic of northern renaissance artworks do albrecht dürer and pieter bruegel the elder share? a. they rarely inclu
VladimirAG [237]
According to my assumptions,the answer closest to the perfection is :

c. they show royalty instead of peasants.
7 0
3 years ago
Blue light of wavelength λ passes through a single slit of width d and forms a diffraction pattern on a screen. If we replace th
ololo11 [35]

Answer:

We can retain the original diffraction pattern if we change the slit width to d) 2d.

Explanation:

The diffraction pattern of a single slit has a bright central maximum and dimmer maxima on either side. We will retain the original diffraction pattern on a screen if the relative spacing of the minimum or maximum of intensity remains the same when changing the wavelength and the slit width simultaneously.

Using the following parameters: <em>y</em> for the distance from the center of the bright maximum to a place of minimum intensity, <em>m</em> for the order of the minimum, <em>λ </em>for the wavelength, <em>D </em>for the distance from the slit to the screen where we see the pattern and <em>d </em>for the slit width. The distance from the center to a minimum of intensity can be calculated with:

                                                    y\approx\frac{m\lambda D}{d}

From the above expression we see that if we replace the blue light of wavelength λ by red light of wavelength 2λ in order to retain the original diffraction pattern we need to change the slit width to 2d:

<em>                                                 </em>y\approx\frac{m\lambda D}{d} =\frac{m2\lambda D}{2d}

7 0
3 years ago
A rifle bullet with mass ma = 8.00 g strikes and embeds itself in a block with mass mb = 0.992 kg that rests on a frictionless,
Doss [256]

Answer:

the magnitude of the velocity of the block just after impact is 2.598 m/s and the original speed of the bullect is 324.76m/s.

Explanation:

a)  Kinetic energy of block = potential energy in spring  

½ mv² = ½ kx²

Here m stands for combined mass (block + bullet),

which is just 1 kg.  Spring constant k is unknown, but you can find it from given data:  

k = 0.75 N / 0.25 cm

= 3 N/cm, or 300 N/m.  

From the energy equation above, solve for v,

v = v √(k/m)  

= 0.15 √(300/1)

= 2.598 m/s.

b)  Momentum before impact = momentum after impact.

Since m = 1 kg,

v = 2.598 m/s,

p = 2.598 kg m/s.  

This is the same momentum carried by bullet as it strikes the block.  Therefore, if u is bullet speed,  

u = 2.598 kg m/s / 8 × 10⁻³ kg

= 324.76 m/s.

Hence, the magnitude of the velocity of the block just after impact is 2.598 m/s and the original speed of the bullect is 324.76m/s.

6 0
3 years ago
I'm stuck on number 4... help please?
Paha777 [63]

Average <u>speed</u> = (distance covered) / (time to cover the distance) =
 
                                     (5m)  /  (15 sec) =

                                     (5/15) (m/s)  =  <em>1/3 m/s</em> .

Average <u>velocity</u> = 

         (displacement) / (time spent traveling)  in the direction of the displacement

Average velocity =  (5m) / (15 sec)  left =

                           (5/15) / (m/sec)  left  =

                               <em>1/3  m/s  left</em>.

A number without a direction is a speed, not a velocity.


3 0
3 years ago
Read 2 more answers
Magnetic poles that are alike a. attract each other. b. repel each other. c. do not interact. d. have the same shape.
Vera_Pavlovna [14]
They repel each other.
4 0
3 years ago
Read 2 more answers
Other questions:
  • What is number one ? ‼️‼️
    8·1 answer
  • Which of the following is not a primary cause of eroding rock
    13·1 answer
  • A river flows due east at 1.60 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant v
    13·1 answer
  • Magnetic fields are caused by?
    14·1 answer
  • What does White Fang’s interaction with the setting reveal?
    8·1 answer
  • Which of the following illustrates two resistors in a parallel circuit
    13·2 answers
  • Bronco the skydiver, whose mass is 100 kg experiences 200 N of air resistance. What is the acceleration of his fall? Show Work
    13·1 answer
  • Can you please give me the answers ?
    8·1 answer
  • 2) A car travels 5 miles north, and then 10 miles south. What is the person's DISTANCE and
    8·1 answer
  • Define quant......am physics​
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!