*expand_more*

*expand_more*

*format_list_bulleted*

#### Concept explainers

*thumb_up*100%

The power required to overcome the aerodynamics drag.

## Answer to Problem 1P

The power required to overcome the aerodynamics drag is

### Explanation of Solution

**Given:**

Drag Coefficient of sports car,

Front area of the car,

Speed of the car,

Density,

**Formula Used:**

The power required to overcome the aerodynamic drag is

Where,

Force =

Velocity =

**Calculation:**

The required power is calculated by power equation

We know that

Force applied on caris given by

Where,

Density =

Front Area of the Car =

Drag coefficient =

Rearranging the equation

To calculate power in

As -

Put the given values in equation

But we want the power in

We know that -

So, the calculated power of equation

**Conclusion:**

Thus, the power required to overcome the aerodynamics drag is

### Want to see more full solutions like this?

*schedule*04:19

# Chapter 2 Solutions

PRIN.OF HIGHWAY ENGINEERING&TRAFFIC ANA.

- While travelling at a constant speed a driver saw a road block 112 m away. He applied the brakes and the car decelerated uniformly at 6.4 m/s^2. It stopped 5 m from the block. Find the initial constant speed of the vehicles in kph, if the drivers perception reaction is 2.2 second
*arrow_forward*Two cars collide with speeds VA = VB = 8kph. Their masses are mA = 1270 kg and mB = 2000 kg. If the coefficient of restitution is 0.2, what is the speed of A after the collision in kph?*arrow_forward*a car starts from rest and travels 10 sec. with an acceleration of a=4-0.3t, then runs for 30 seconds at constant velocity and finally comes to rest by decelerating at 3.125 m per sq. s Determine the velocity of the car after 10 seconds. A. 20 m/s B. 25 m/s C. 30 m/s D. 35 m/s E. none of the above point Determine the distance travelled by the car during the period of 10 seconds. A. 120m B. 150m C. 170m D. 182m E. None of the above Determine the total distance travelled by the car until it stop A. 950m B. 1000m C. 1050m D. 1100m E. None of the above*arrow_forward* - An automobile A travelling at a constant velocity of 45 ft/s passes a gasoline station. After 2 seconds, another automobile B leaves the gasoline station and accelerates at the constant rate of 6 ft/s2. How long will the second automobile overtakes the first?
*arrow_forward*An automobile starting from rest speeds up to 40 meters per seconds with a constant acceleration of 4 meter per seconds square, runs at this speed for a time, and finally comes to rest with a deceleration of 5 meters per second square. If the total distance traveled is 1000 meters, find the (a) distance traveled covered during the acceleration, (b) distance traveled at constand speed, and (c) the total time of travel.*arrow_forward*The coefficient of friction of a car initially travelling at 150 kph is 0.47. What should the downgrade be if the distance travelled by the vehicle before coming to a stop is 200 m*arrow_forward* - In traveling a distance of 3.3 km between points A and D, a car is driven at 86 km/h from A to B for t seconds and 42 km/h from C to D also for t seconds. If the brakes are applied for 4.8 seconds between B and C to give the car a uniform deceleration, calculate t and the distance s between A and B.
*arrow_forward*A car of mass 1.2 tonnes is traveling along a straight horizontal Road at a speed of 20 m/s when it breaks sharply then skids. Friction brings the car to rest. If the coefficient of friction between the tyres and road is 0.8, calculate the deceleration and the distance travelled by the car before ut comes to rest.*arrow_forward*A particle traveling in a straight line starts from rest it has an acceleration of a=B^3t^2+ct, if B=8m/s^4 and c=-2m/s^3, Find the velocity and total distance traveled at t=3sec*arrow_forward* - An engineering student examining the scene of an accident, observe skid marks 30.0m long by a 1600kg car. The car skidded to a stop on a concrete highway having a coefficient of kentic with the tires of 0.75. Estimate the car speed of the beginning of the speed.
*arrow_forward*The acceleration of a rocket traveling upward is given by a = (6 + 0.02s) m/sec2, where s is in meters. Determine the time needed for the rocket to reach an altitude of s = 100 m. Initially, v = 0 and s = 0 when t = 0.*arrow_forward*A car traveling at 30 m/sec has wheels with 75cm diameters. Find: angular speed of wheels, if the car stops in 5 sec, what is angular acceleration? how many revolutions do the wheels turn before stopping?*arrow_forward*

*arrow_back_ios*

*arrow_forward_ios*

- Traffic and Highway EngineeringCivil EngineeringISBN:9781305156241Author:Garber, Nicholas J.Publisher:Cengage Learning