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
Luda [366]
3 years ago
15

A 1500 kg car skids to a halt on a wet road where μk = 0.51. how fast was the car traveling if it leaves 66-m-long skid marks?

Physics
1 answer:
djverab [1.8K]3 years ago
3 0

We got coefficient of friction uk = 0.51<span>
Mass m = 1500 kg 
normal force on the car = weight of the car = 1500 * 9.8 N = 14700 N 
and the force of friction on the car, f = uk * normal force = 0.51 * 14700 N = 7497 N 
taking Acceleration a = -f/m = -7497/1500 = -4.998 m/s^2 
Displacement s = 66 m 
Final velocity v = 0 
Initial velocity u = ? 
v^2 = u^2 + 2as 
<span>0 = u^2 - 2 * 4.998 * 66
<span>u = 25.69 m/s </span></span></span>

You might be interested in
A machinist turns the power on to a grinding wheel, at rest, at time t = 0 s. The wheel accelerates uniformly for 10 s and reach
Nookie1986 [14]

Answer:489 Revolutions

Explanation:

Given

Angular deceleration(\alpha ) =1.5rad/s^2

Given wheel angular velocity =96 rad/s when machine is turned off

time taken by machine to reach zero angular velocity

0=\omega _0+(\alpha)t

0=96+(-1.5)t

t=64 sec

angular displacement is given by

\theta =\omega_0t+\frac{1}{2}\alpha t^2

\theta =96(64)-\frac{1}{2}(-1.5)(64^2)=3072 degree

For revolutions =\frac{3072}{2\cdot \pi}=488.86 \approx 489 revolution during Slowdown

5 0
3 years ago
Un móvil se desplaza con movimiento uniforme con una rapidez de 36 Km/h ¿Cuál es la distancia recorrida al cabo de 0,5 horas?
Diano4ka-milaya [45]

Answer:

Distancia = 17,5 kilómetros.

Explanation:

Dados los siguientes datos;

Velocidad = 36 km/h

Tiempo = 0.5 horas

Para encontrar la distancia recorrida;

Distancia = velocidad * tiempo

Distancia = 35 * 0.5

Distancia = 17,5 kilómetros.

Por tanto, la distancia recorrida por el automóvil es de 17,5 kilómetros.

4 0
3 years ago
Mean arterial pressure is ________ (indirectly/directly) proportional to ________ and ________ (indirectly/directly) proportiona
g100num [7]

Answer: Mean Arterial Pressure is directly proportional to Cardiac Output and Systemic Vascular Resistance and also directly proportional to Central Venous Pressure.

Explanation: Based on the relationship of flow, pressure and resistance, the mean arterial pressure is determined by the cardiac output (CO), systemic vascular resistance (SVR), and central venous pressure (CVP). This relationship is given by:

MAP = (CO x SVR) + CVP

Which is alternatively expressed as:

MAP = CO x SVR (this is because at any point in time in blood circulation, the central venous pressure is always near to zero mmHg.

Due to this direct relationship, any factor affecting the cardiac output and the Systemic Vascular Resistance would cause a corresponding change in the Mean Arterial Pressure.

It is also worthy to note that If Cardiac Output and Systemic Vascular Resistance change reciprocally (inversely) and proportionately, then Mean Arterial Pressure will not change. The plotted graph is one of positive slope.

The whole relationship occurs when blood is pumped out of the left ventricle into the aorta and distributing arteries, creating pressure.

6 0
3 years ago
A lunar module (LM) lifts off from the lunar surface and flies a powered trajectory to its burnout point at 30 km altitude. The
xxTIMURxx [149]

Answer:

Detailed solution is given below:

7 0
4 years ago
Escriba un texto sobre el significado que ha tenido para la humanidad la utilización de la electricidad
ratelena [41]

Explanation:

La electricidad fue uno de los mayores inventos tecnológicos y científicos del mundo que permitió una gran evolución de la sociedad.

Es a través de la electricidad que podemos realizar tareas que parecen tan habituales en la actualidad, como usar luz eléctrica, usar internet, conservar alimentos, tomar baños calientes, y otras tareas que forman parte de la rutina diaria de miles de personas alrededor del mundo. mundo.

Por tanto, es importante observar en un contexto general cómo la electricidad ha traído beneficios a la humanidad, como la conservación de los alimentos por ejemplo, que ha facilitado la vida cotidiana.

En el entorno empresarial, la electricidad posibilitó la creación de máquinas, la automatización del trabajo, lo que facilita las funciones de los empleados, aumenta la seguridad de la empresa, permite el crecimiento empresarial y la aparición de muchos productos y servicios que existen en la economía actual.

En medicina ayudó en el tratamiento de enfermedades, en la creación de medicamentos, etc.

En la sociedad, la electricidad hace posible el saneamiento, permite una mejor calidad de vida para las personas, un mayor intercambio de información y varios otros desarrollos que tienen un impacto directo en la vida de cualquier persona.

7 0
3 years ago
Other questions:
  • What is work done in physics and how can it be calculated
    14·2 answers
  • The universal law of gravitation states that the force of attraction between two objects depends on which quantities? the masses
    14·2 answers
  • The line of latitude that is zero degrees latitude is the
    8·1 answer
  • The wavelength of a wave is the distance between
    6·1 answer
  • Heat is best defined as
    11·2 answers
  • Suppose you are moving left (negative) with a velocity of -10 m/s. what happens to your speed if you have a negative acceleratio
    10·1 answer
  • An airplane accelerates down a run-way at 3.20m/s2 for 32.8s until is finally lifts off the ground. Determine the distance trave
    8·1 answer
  • The coefficient of linear expansion of lead is 29 x 10 K What change in temperature will cause a 5-m long lead bar to change in
    5·1 answer
  • Beth moves a 15 N book 20 meters in 10 seconds. How much power was produced?
    5·1 answer
  • Below is a physics question
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!