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 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 November 28th, 2009
by admin
Sam Peltier asked: My physics lab requires me to find the mass of a van without turning it on. My group can move the car, but we cannot turn it on. We can use the following items:
-3 Bathroom scales
-1 Stopwatch
-1 Measuring tape
I have to incorporate friction. To find the friction coefficient, we will push the car at a constant velocity with the bathroom scales between us and the car. The total force shown on the scales will be the amount of force needed to overcome friction resistance. I do not know what to do after that.
Tags: Constant Velocity, Friction Resistance, Stopwatch
Posted in Engineering | 2 Comments »
Posted October 28th, 2009
by admin
JerichoX asked: A woman pulls a shopping car with a force F at an angle of 35. The car mass is 20kg and its friction coefficient is 0.05. Find:
(A) The force the woman needs to apply to move the car with a constant velocity of 1m/s.
(B) The magnitude of the normal force and friction when the car moves at constant velocity.
(C) The force the woman needs to exert to push the car with a constant velocity of 1/s.
(D) The Displacement if the car is pushed 5 seconds and the displacement if the car is pulled 5 seconds.
Tags: 1m, Constant Velocity, Friction Coefficient
Posted in Physics | 3 Comments »
Posted October 25th, 2009
by admin
JerichoX asked: A woman pulls a shopping car with a force F at an angle of 35. The car mass is 20kg and its friction coefficient is 0.05. Find:
(A) The force the woman needs to apply to move the car with a constant velocity of 1m/s.
(B) The magnitude of the normal force and friction when the car moves at constant velocity.
(C) The force the woman needs to exert to push the car with a constant velocity of 1/s.
(D) The Displacement if the car is pushed 5 seconds and the displacement if the car is pulled 5 seconds.
Tags: Constant Velocity, Friction Coefficient, Magnitude
Posted in Physics | 3 Comments »
