What is the required force to pull a shopping car?


Posted October 28th, 2009 by admin 3 Comments »
car
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.

Suppose a car can accelerate at 1m/s2. How large a break in traffic is needed to enter a highway where cars?


Posted January 26th, 2009 by admin 2 Comments »
car
Vivian C asked:


Suppose a car can accelerate at 1m/s2. How large a break in traffic is needed to enter a highway where cars are moving a 20m/s if the drive wants to avoid forcing the next car to slow down or to approach closer than 25m?