Posted November 9th, 2010
by admin
lisa asked: A train is traveling up a 4.4 degrees incline at a speed of 2.45 m/s when the last car breaks free and begins to coast without friction.
How long does it take for the last car to come to rest momentarily?
How far did the last car travel before momentarily coming to rest?
Tags: Friction, Last Car, Train
Posted in Physics | 1 Comment »
Posted September 17th, 2010
by admin
Allison D asked: Two cars travel westward along a straight highway, one at a constant velocity of 83 km/h, and the other at a constant velocity of 112 km/h.
Assuming that both cars start at the same point, how much sooner does the faster car arrive at a destination 24 km away?
Answer in units of h.
Tags: Constant Velocity, Travel, Two Cars
Posted in Physics | No Comments »
Posted August 30th, 2010
by admin
Rupert Maiden asked: Like when two cars collide and try to swerve away, but crash then rebound and roll off or move off in different directions…
for example, car A comes from the east, car B comes from the west. Car A and B collide and Car A goes off at an angle of 68 degrees south while car B goes off at 22 degrees north, how would this happen?
Tags: Crash, Two Cars, West Car
Posted in Physics | 1 Comment »
Posted August 30th, 2010
by admin
ca.fa. asked: A car is parked near a cliff overlooking the
ocean on an incline that makes an angle of
14◦ with the horizontal. The negligent driver
leaves the car in neutral, and the emergency
brakes are defective. The car rolls from rest
down the incline and has a velocity 10 m/s
when it reaches the edge of the cliff. The cliff
is 46.4 m above the ocean.
How far is the car from the base of the cliff
when the car hits the ocean?
It’s saying 29.6 is wrong.
Tags: Emergency Brakes, Leaves, Negligent Driver
Posted in Physics | 3 Comments »
Posted July 17th, 2010
by admin
Mariah asked: A race driver has made a pit stop to refuel. After refueling, he starts from rest and leaves the pit area with an acceleration whose magnitude is 5.4 m/s2; after 3.8 s he enters the main speedway. At the same instant, another car on the speedway and traveling at a constant velocity of 68.9 m/s overtakes and passes the entering car. The entering car maintains its acceleration. How much time is required for the entering car to catch up with the other car?
Tags: Constant Velocity, Leaves, Speedway
Posted in Physics | 1 Comment »
Posted May 5th, 2010
by admin
Frank asked: The pressure inside an automobile cylinder is measured every 3 second and the cylinder piston is cycling 1500 times per minute. Is it a good measurement? Why or why not?
Tags: Automobile, Cycling, Piston
Posted in Physics | No Comments »
Posted April 21st, 2010
by admin
Ying Y asked: An automobile has a 12-W reading lamp in the ceiling. This lamp operates with a voltage drop of 12 V across it. How much current flows through the lamp? Round the answer to 3 significant digits.
Tags: Automobile, Reading Lamp, Significant Digits
Posted in Physics | 1 Comment »
Posted April 21st, 2010
by admin
ATGC asked: Determine the number of revolutions through which a typical automobile tire turns in 1 yr. Suppose the automobile travels 12000 miles each year on tires with radius 0.225 m.
Tags: Automobile Tire, Radius, Tires
Posted in Physics | 2 Comments »
Posted April 19th, 2010
by admin
vince t asked: that is, considering the automobile to be a “matter” wave?
(answer in nm)
Tags: Kg, Matter Wave, Traveling
Posted in Physics | 1 Comment »
Posted April 11th, 2010
by admin
eyra_027 asked: an automobile starts from rest and in 100 ft attains a speed of 30miles/hour. in what time has it traveled and what is the acceleration?
Tags: Acceleration, Automobile
Posted in Physics | 2 Comments »
