This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: mata (jpm2873) HW #5 Antoniewicz (57420) 1 This printout should have 20 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 (part 1 of 2) 5.0 points A 3 . 2 kg block is placed on top of a 11 . 7 kg block. A horizontal force of F = 55 . 9 N is applied to the 11 . 7 kg block, and the 3 . 2 kg block is tied to the wall. The coefficient of kinetic friction between all moving surfaces is 0 . 178. There is friction both between the masses and between the 11 . 7 kg block and the ground. The acceleration of gravity is 9 . 8 m / s 2 . 3 . 2 kg 11 . 7 kg = 0 . 178 = 0 . 178 F T Determine the tension T in the string. Answer in units of N. 002 (part 2 of 2) 5.0 points Determine the magnitude of the acceleration of the 11 . 7 kg block. Answer in units of m / s 2 . 003 (part 1 of 2) 5.0 points A small metal ball is suspended from the ceil ing by a thread of negligible mass. The ball is then set in motion in a horizontal circle so that the thread describes a cone. The acceleration of gravity is 9 . 8 m / s 2 . v 9 . 8 m / s 2 1 . 4 m 5 . 6 kg 3 1 What is the speed of the ball when it is in circular motion? Answer in units of m / s. 004 (part 2 of 2) 5.0 points How long does it take T period for the ball to rotate once around the axis? Answer in units of s. 005 10.0 points The force required to stretch a spring varies directly with the amount the spring is stretched. A force of 85 pounds is needed to stretch a spring 18 inches, as shown in the...
View Full
Document
 Spring '08
 Turner
 Physics

Click to edit the document details