Tuesday
October 21, 2014

Homework Help: Physics

Posted by Gullu on Thursday, August 18, 2011 at 8:12pm.

Two cars travel at the same speed, so that they move 105 km in one hour. One car, a sleek
sports car, has a motor that delivers only 35 kW of power at this speed. The other car
needs its motor to produce 65 kW to move the car this fast. The difference is caused by air
resistance.
a. For each car, list the external horizontal forces exerted on it, and give the cause of each
force. Compare their magnitudes.
b. By Newton’s third law, the car exerts forces on the ground and the air. What are their directions?
c. Calculate the magnitude of the forward frictional force exerted by each car.
d. The car engines did work. Where did the energy come from?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - Two cars travel at the same speed, so that they move 105 km in one ...
Algebra - Two cars start at the same point at Alexandria, verginia, and travel 2...
Algebra - Two cars start at the same point at Alexandria, verginia, and travel ...
physics - Please decide which of the following statements for car collisions are...
Physics - Two cars start from the same place at the same time. After two hours, ...
Algebra - Yes. The car will travel 40 miles in an hour. A certain Car Travels 14...
Phsyics - Two cars start from the same place at the same time. After two hours, ...
math - Currently, the Toyota Corolla is the best selling car in the world. ...
math - Currently, the Toyota Corolla is the best selling car in the world. ...
physics - A 910 kg sports car slows down to 6.0 m/s to read a cross street sign...

Search
Members