# hw5 - = 0 . 3 determine the speed at which each crate...

This preview shows pages 1–2. Sign up to view the full content.

ME 244 Assignment 5 Spring 2010 Department of Mechanical Engineering, Yeditepe University Due date: 26 March 2010, Friday - 5 PM Policy: The assignments should be done by each student individually, not as group work. The due date and time is Friday 5 PM, one week after the assignment is given. No late submissions are accepted. The assignments should be submitted to the Teaching Assistant of the course, Batuhan Baturalp (Room A702). 1. The block has mass M = 150 kg and rests on a surface for which the coeﬃcients of static and kinetic friction are μ s = 0 . 5 and μ k = 0 . 4 respectively. If a force F = 60 t 2 N is applied to the cable, determine the power developed by the force at 5 s ( g = 9 . 81 m/s 2 ). 2. The conveyor belt delivers crate each of mass M = 12 kg to the ramp at A such that the crate’s velocity is v A = 2 . 5 m/s, directed down along the ramp. If the coeﬃcient of kinetic friction between each crate and the ramp is μ k

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: = 0 . 3 determine the speed at which each crate slides oﬀ the ramp at B. Assume that no tipping occurs ( θ = 30 ◦ , a = 3 m, g = 9 . 81 m/s 2 ). 3. The motor pulls on the cable at A with a force F = 150 + 5 t 2 N. If the crate of weight W = 85 N is originally at rest at t = 0, determine its speed at time t = 4 s. Neglect the mass of the cable and pulleys. Hint: First ﬁnd the time needed to begin lifting the crate. 4. The boy B jumps oﬀ the canoe at A with a velocity v BA = 5 m/s relative to the canoe as shown. If he lands in the second canoe C, determine the ﬁnal speed of both canoes after the motion. Each canoe has a mass M C = 40 kg. The boy’s mass is M B = 30 kg, and the girl D has a mass M D = 25 kg. Both canoes are originally at rest ( θ = 30 ◦ ). 1 Figure 1: Question 1 Figure 2: Question 2 Figure 3: Question 3 Figure 4: Question 4 2...
View Full Document

## hw5 - = 0 . 3 determine the speed at which each crate...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online