Q4. The system consists of 60 lb and 20 lb blocks A and B, respectively, and 5 lb pulleys C and D thatcan be treated as thin disks. Determine the speed of block A after block B has risen 5 ft, starting fromrest. Assume that the cord does not slip on the pulleys, and neglect the mass of the cord.0.5 ftA0.5 ftDB

Answered: Image /qna-images/answer/2f99fb33-30df-4548-8a66-6e44674ea0eb.jpg

Answered: Q4. The system consists of 60 lb and 20…

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.79P: The coefficient of rolling resistance between the 30-kg lawn roller and the ground is r=0.1. (a)...

See similar textbooks

Similar questions

The 1600 kg car has a velocity of v the driver sees an obstacle 175 m away, in front of the car. It takes 0.8 s for him to react and lock the brake 100 km/h when causing the car to skid. The coefficient of kinetic friction between the tires and the road is p = 0.25. Find the best correct statement(s) from the following for this situation: ,= 100 km/h Select one or more: Work done by the frictionis equal to 617.4 KW The working forces are ficion and the wejght. The car will stop just in front of the pbstacle without hittungui The car will hit the obstadle. The car skid for the distance of 157.34m,
Neglect friction of the 55-lbf collar against its vertical guide and compute the velocity of the collar after it has fallen 7ft., starting from 22 ft/sec. in the position shown below. The unstretched length of the spring is 3ft. DON'T ROUND OFF IN THE SOLUTION. ROUND OFF ONLY IN THE FINAL ANSWER.
An SUV hauling a trailer is travelling at 25 m/s when the driver hits the brakes. The 1.4 MT trailer is equipped withan in-cab controlled electronic drum brake with a braking force of 4500 N. If the brake force applied to the 1.6 MTSUV is 5500 N, what is the braking distance of both the SUV and the trailer? Determine the force exerted by the trailer to the SUV.
The 5.27 kg collar B rests on the frictionless arm AA! The collar is held in place by the rope attached to drum D and rotates about O in a horizontal plane. The linear velocity of the collar B is increasing according to v = 0.2 t2 where v is in m/s and tis in seconds. Find the tension in the rope and the force of the bar on .the collar if 5 s,r= 0.558 m and 0 = 58° A A' D
Block A (99-lb) is attached to block B (49-lb) through the interconnected pulleys C and D, as shown in the figure above. The coefficient kinetic friction between block A and the incline is 0.2. If block A has now a speed of 5(ft/s) down the incline, then while neglecting the mass of pulleys and ropes, Determine: 1. The Acceleration of block A 2. The distance (magnitude and direction) block B moves as block A slides to a stop.
3. A crate has a mass of 100kg and is being towed by a chain which is always directed at 2 from the horizontal. Determine the crate's acceleration in t=2sec if the coefficient of static friction is 0.4 and the coefficient of kinetic friction is 0.3 and the towing force is P= ()N, where t is in seconds.
A constant force of ''F'' acts on a mass as shown. The mass starts its motion from rest at position 1, the unstretched length of the spring is 250 mm, and the spring modulus is k=1,5 k?/m. Neglecting the friction, determine the required force ''F'' to cause the 2−kg mass to have a speed of v2=1,5 m/s at position 2.
A cart has a mass of 1.5 kg. It is given some initial push toward a sensor and is slowed by a hanging mass which makes the cart turn around and speed up as it returns to its original position. This situation is illustrated in the attached image. If the acceleration towards the sensor is 0.5 m/s2 and the accaleration away from the sensor is 0.15 m/s2, a. draw the free body diagrams for the cart moving towards the sensor and away from the sensor. b. Write Newton's law for both situations and solve for the frictional force and for the force from the hanging mass.
Using a forked rod, a smooth cylinder P, having a mass of 0.4 kg, is forced to move along the vertical slotted path r- (0.60) m, where e is in radians. If the cylinder has a constant speed of te- 2 m/s, determine the force of the rod and the normal force of the slot on the cylinder at the instant e- rad. Assume the cylinder is in contact with only one edge of the rod and slot at any instant. Hint To obtain the time derivatives necessary to compute the cylinder's acceleration components a, and a, take the first and second time derivatives of r- 0.60. Then, for further information, use Eq. 12-26 to determine 8. Also, take the time derivative of Eq. 12-26, noting that te - 0, to determine 8. -060
The radius of a highway curve is 120m, and has an angle of 9.31 from the horizontal. The center of gravity of the car is located 0.80m above the roadway and the distance between the two front wheels is 1.2m. if the car has a total weight of 15KN, a. Determine the normal acceleration (m/s2) and the velocity (in kph) of the car before overturning? Assume that friction is great enough to prevent sliding. b. Find the maximum velocity of the car could move in the curve so that there will be no pressure between the tires and the roadway, kph. c. What is the velocity of the car to prevent sliding up if the coefficient of kinetic friction is 0.60?
The slotted arm OA rotates about a fixed axis through O. At the instant under consideration, 0-28%, 0-55 deg/s, and 0 - 10 deg/s². Determine the magnited of the force F applied by arm OA and the magnitude of the force N applied by the sides of the slot to the 0.5-kg slider B. Neglect all friction, and let L -0.75 m. The motion occurs in a vertical plane. Answers: F- N- i i 6 -L m N N B 71°
The motor M is at rest when someone flips a switch and it starts pulling in the rope. The acceleration of the rope is uniform and such that it takes 0.50 s to achieve a retraction rate of 7.00 ft/s. Determine the tension in the rope during initial 0.50 s. The cargo C weighs 2576 lb., the weight of the ropes and pulleys is negligible, and friction in the pulleys is negligible. Note: answer to be in pounds (Ib). motor M cargo C

SEE MORE QUESTIONS

Recommended textbooks for you

International Edition---engineering Mechanics: St…

Mechanical Engineering

ISBN:

9781305501607

Author:

Andrew Pytel And Jaan Kiusalaas

Publisher:

CENGAGE L