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 1200 kg car is driven in sand at 5.2 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 propulsion force is needed to keep the car moving forward at a constant speed?
b. what power is required for propulsion at 5.2 m/s?
if the car gets 15 mpg when driving on sand, what is the car's efficiency? assume the density of gasoline is 719.7 kg/m^3.
!
Answers: 1
Physics, 23.06.2019 01:30
)consider two positively charged particles, one of charge q0 (particle 0) fixed at the origin, and another of charge q1 (particle 1) fixed on the y-axis at (0,d1,0). what is the net force f⃗ on particle 0 due to particle 1?
Answers: 2
Physics, 23.06.2019 02:30
Atrain is traveling at 30.0 m/s relative to the ground in still air. the frequency of the note emitted by the train whistle is 262 hz. the speed of sound in air should be taken as 344 m/s. what frequency (f approach) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and approaching it? what frequency (f recede) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and receding from it?
Answers: 1
Physics, 23.06.2019 05:00
What about a rubber band, can it change its shape? is it a solid?
Answers: 2
Driving on asphalt roads entails very little rolling resistance, so most of the energy of the engine...
Mathematics, 29.09.2019 04:10
Arts, 29.09.2019 04:10
Mathematics, 29.09.2019 04:10
Mathematics, 29.09.2019 04:10
English, 29.09.2019 04:10
History, 29.09.2019 04:10
Mathematics, 29.09.2019 04:10
Computers and Technology, 29.09.2019 04:10
English, 29.09.2019 04:10
Social Studies, 29.09.2019 04:10
Chemistry, 29.09.2019 04:10
Physics, 29.09.2019 04:10