The energy stored in gasoline is approximately 3.50×104 kJ per litre; 25% of this is converted into useful work by an automobile. When you drive on the highway at constant speed, most of the work the car does is against the drag force.
A) Assuming there is no wind, how far can the car travel on a level road at 32.4 m/s with 17 L of gasoline? The force due to air resistance is F = Dv2, where D = 0.915, and v is the velocity in m/s.
B) If you decide to use side roads and travel at half the speed, how far can you go with the same amount of gas?
The energy stored in gasoline is approximately 3.50×104 kJ per litre; 25% of this is converted...
3. [1pt] The energy stored in gasoline is approximately 3.50×104 kJ per litre; 25% of this is converted into useful work by an automobile. When you drive on the highway at constant speed, most of the work the car does is against the drag force. Assuming there is no wind, how far can the car travel on a level road at 28.2 m/s with 11 L of gasoline? The force due to air resistance is F = Dv2, where D...
3.pl The energy stored in gasoline is approximately 3.50x10 per litre: 25% of this is converted into useful work by an utomobile. When you drive on the highway at constant speed, most of the work the car does is against the drag force. Assuming there is no wind, how far can the car travel on a level road 29.7 ms with 17 L of gasoline? The force due to air resistance is f = Dv., where D = 0.915 kg/m,...
Driving on asphalt roads entails very little rolling resistance, so most of the energy of the engine goes to overcoming air resistance. But driving slowly in dry sand is another story. If a 1500 kg car is driven in sand at 5.0 m/s, the coefficient of rolling friction is 0.06. in this case, nearly all of the energy that the car uses to move goes to overcoming rolling friction, so you can ignore air drag in this problem. a.) What...
At high speed, the main retarding force on an automobile is air drag. We haven’t specifically studied air drag yet, because it’s quite simple. The drag force is very well approximated as Fdrag = γv^2 where γ depends on the shape and size of the car. Consider a car with γ = 1.9N/ (m/s)^2 and an engine that develops a maximum power s of 75 kW. (Remember, this means that the engine does 75 kJ of work per second.) (a)...
13) There are several types of drag on a car other than air resistance. Effects having to do with the squeezing of the tires (rolling resistance) and frictional forces in the drivetrain (the system that transfers energy from the engine to the rotation of the wheels) also must be taken into account. Engineers use the following equation to model the total force due to these different effects Fdrag=A+Bv+Cv2Fdrag=A+Bv+Cv2 For a Camry, these coefficients are estimated to be A=117.130A=117.130 N, B=1.800...
4. In a collision which of the following quantities is always conserved? A). Acceleration B). Energy C). Kinetic Energy D). Momentum 5. If the applied force is perpendicular to the motion of the object then the Work done by the force is ___ A). Negative B). Positive C). Zero 6. A car, travelling at 40m/s slows to 10m/s in 5 seconds. What was the acceleration? A). -6 m/s? B). -4m/s2 C).-2 m/s2 D). -9.8m/s 7. A ball thrown straight up...
39. (4 pts) A 500-g mass drops from a height of 10.0 meters. What is its speed just before it hits the ground? 40. (4 pts) A flight attendant pulls a wheeled suitcase, applying a 66-N force at a 35° angle to the horizontal. How much work does she do in pulling the suitcase 45 m? 41. (4 pts) A 1525-kg car drives up a mountain road a vertical rise of 1301 m from the base elevation in 30. min...
Assignment 9 If you run around a half-mile track twice in 20 minutes a. What is the total distance traveled? b. What is the speed in mi/hr (show work)? c. What is the total displacement? d. What is the velocity in mi/hr? You travel east 2 miles and then turn to the north and walk another 3 miles. What is your displacement (show work, make sure to show the direction as well)? You travel 6 miles at 40 degrees. How...
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Hint: For this problem, all angle units must be converted to the 'natural' unit for angular displacement, and without a picture, you won't get far at all. A bike racer speeds up on a horizontal road. The wheel of radius 0.34 m is rotating at a rate of 0.70 revolutions per second at time = 0.0 s. The racer accelerates at a constant rate so that 0.22 seconds later her wheel rotates at 1.10 revolutions per second, after which she...