67%(3)2 out of 3 people found this document helpful
This preview shows page 3 - 13 out of 13 pages.
2.If the mass of the block was doubled, the angle of repose should still be the same for the original mass because it is independent of the mass. However, when looking at our
coefficient of static friction results, we did not get the expected. At 0.5 kg the angle of repose was 23 degrees, and at 1.0 kg the angle of repose was 18 degrees. 3.The wooden block had to be tapped because there needed to be a force applied to overcome the force of friction causing the wooden block to start to slide down the plane.4.Anti-lock brakes use static friction to cause the car to stop short. The slowing of the car isdirectly applied to the rotational speed of the tires. In other words, the brakes do not lock the tires to keep them from revolving in order to stop, which would cause the car to skid across the surface due to unequal frictional force. The conventional brakes take a longer time to stop because the static friction of the road is not always available for the car due to different road conditions. 5.The graphing method would probably be more accurate because it takes into account multiple masses for the wooden block and how that affects the coefficient of kinetic friction. The constant velocity method only relies on the angle at which the block experiences constant velocity.