- #1
katysmith
- 2
- 0
Hi, this question seems pretty easy, but I was just wondering if I'm missing anything with my solutions.
Two ramps, one steeper than the other, are available to move a heavy crate from the ground onto the bed of a truck. In the absence of friction, it takes more force to push the crate up the steeper ramp. Does this mean it also takes more work to raise the crate onto the bed of the truck along the steeper ramp?
Yes, W=FD, greater F, means great W
Taking friction into account, which ramp requires less work for pushing the crate on the truck?
The steeper ramp, as the frictional force will be less. F=cosO*N*u; greater angles means less frictional force
What is the angle of inclination that minimizes the work, and how is it related to the coefficient of kinetic friction? It seems like the angle that would minimize the work, would be the angle with the least frictional force, but the least frictional force would occur when theta is 90 degrees, or directly vertical, and that doesn't make sense. The coefficient of kinetic friction is not connected to the angle
Two ramps, one steeper than the other, are available to move a heavy crate from the ground onto the bed of a truck. In the absence of friction, it takes more force to push the crate up the steeper ramp. Does this mean it also takes more work to raise the crate onto the bed of the truck along the steeper ramp?
Yes, W=FD, greater F, means great W
Taking friction into account, which ramp requires less work for pushing the crate on the truck?
The steeper ramp, as the frictional force will be less. F=cosO*N*u; greater angles means less frictional force
What is the angle of inclination that minimizes the work, and how is it related to the coefficient of kinetic friction? It seems like the angle that would minimize the work, would be the angle with the least frictional force, but the least frictional force would occur when theta is 90 degrees, or directly vertical, and that doesn't make sense. The coefficient of kinetic friction is not connected to the angle