Chapter 13, Problem 41P

A 60-kg block is at rest when an upward force parallel to the 15° surface is applied. If uk =0.18, and ,us= 0.23, a. Determine the acceleration if P=180N. b. Determine the acceleration if P=320N.

The standard test to determine the maximum lateral acceleration of a car is to drive it around a 200- ft-diameter circle painted on a level asphalt surface. The driver slowly increases the vehicle speed until he is no longer able to keep both wheel pairs straddling the line. If this maximum speed is 35 mi/hr for a 3000-lb car, determine its lateral acceleration capability an in g's and compute the magnitude F of the total friction force exerted by the pavement on the car tires. 100 ft

Determine the force acting on the cylinder at t = 3 s.

The two 0.2kg sliders A and B move without friction aound the horizontal circular slot. The sliders are connected by an inextensible cable AB. The system starts from rest in the position shown in the figure. Determine the a. Angle between the tangential acceleration of A, B and the cable AB at this instance. b. Normal force of the cicular slot on slider A and B at this instance c. Tension at cable AB at this instance

The 69-kg crate is stationary when the force Pis applied. Determine the resulting acceleration of the crate if (a) P = 0, (b) P = 239 N, and (c) P = 493 N. The acceleration is positive if up the slope, negative if down the slope. H, = 0.25 HE = 0.18 69 kg 18

The 33-kg crate is stationary when the force Pis applied. Determine the resulting acceleration of the crate if (a) P = 0, (b) P = 143 N, and (c) P = 322 N. The acceleration is positive if up the slope, negative if down the slope. H, = 0.37 H = 0.29 33 kg 25 Part 1 X Incorrect Part (a). We need to decide if the block moves. The easy way to make this decision is to assume that the block does not move and then to test this assumption. If P = 0, what friction force F is needed to keep the block from moving? mg N Answer: F = i 3.034 N

A homogeneous cylinder of radius R > H rests on a horizontal board with a step of height H as the picture shows. Determine the maximum possible acceleration a from the table, such that the cylinder does not start to climb the step. The friction between the board and the floor is neglected. R gv2RH-H² Amáx R-H ANS. H

The 33-kg crate is stationary when the force Pis applied. Determine the resulting acceleration of the crate if (a) P-0, (b) P- 143 N, and (c) P- 322 N. The acceleration is positive if up the slope, negative if down the slope. [H, = 0.37 H = 0.29 33 kg Part 1 v Correct Part (a). We need to decide if the block moves. The easy way to make this decision is to assume that the block does not move and then to test this assumption. If P-0, what friction force Fis needed to keep the block from moving? mg Answer: F- 136.014 eTextbook and Media Hint Attempts: 2 of 3 used Part 2 Correct Part (a). P- 0. What is the maximum friction force Fmey that is availalbe for this situation? mg Answer: Fmax - 108.55

The 56-kg crate is stationary when the force P is applied. Determine the resulting acceleration of the crate if (a) P = 0, (b) P = 154 N, and (c) P = 439 N. The acceleration is positive if up the slope, negative if down the slope. Part 1 20° P Part (a). We need to decide if the block moves. The easy way to make this decision is to assume that the block does not move and then to test this assumption. If P = 0, what friction force F is needed to keep the block from moving? F 56 kg. Answer: F = i mg [H₂ = 0.27 μ = 0.20 N N