(a) A force of 50 N inclined at an angle of 300 with the vertical axis moves a square block of mass 6 kg that is initially at rest on a horizontal table. The force is applied with an inextensible rope attached at the top right corner of the block. Find the velocity of the block after 8 secs. Take coefficient of kinetic friction as 0.2.

(a) A force of 50 N inclined at an angle of 300 with the vertical axis moves a square block of mass 6 kg that is initially at rest on a horizontal table. The force is applied with an inextensible rope attached at the top right corner of the block. Find the velocity of the block after 8 secs. Take coefficient of kinetic friction as 0.2.

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 7.48P: Find the smallest distance d for which the hook will remain at rest when acted on by the force P....

See similar textbooks

Similar questions

The figure shows a steel bar being processed by a rolling mill. Given that P=80kN and r =0.016, determine the force F required to advance the bar at a constant speed.
An empty freight car with a mass of 10,000 kg rolls at 5 m/s along a level track and collides with a loaded car with a mass of 20,000 kg, standing at rest with brakes released. Friction can be neglected. If the cars couple together, find their speed after the collision. a. Find the decrease in kinetic energy as a result of the collision. b. With what speed should the loaded car be rolling towards the empty car for both to be brought to rest by the collision? Please show the given, formula, figure, and free body diagram.
In the system in which the first starts to move without speed, the masses of 10, 1 kg each, with the effect of the 18 N force T, with a radius of R=578 mm in t secondsIt reaches an angular velocity of 141 rpm. Since the radius of the pulley is r= 165 mm, ignore the friction and all the masses except the four masses.Find t by
The block is released from rest at the position shown, figure 1. The coefficient of kinetic friction over length ab is 0.22, and over length bc is 0.16. Using the principle of work and energy, find the velocity with which the block passes position c.
A 25-kg block is initially at rest on a horizontal surface, and a horizontal force of 75.0 N is required to set the block in motion after which a horizontal force of 60.0 N is required to keep the block moving with constant speed. Find (a) the coefficient of static friction and (b) the coefficient of kinetic friction between the block and the surface.
A spring with spring constant k=70 kN/m is used to stop the box of mass m with initial velocity V1= 7 m/s. The spring is initially compressed 100 mm with cables. Since the box produces a maximum compression x=60 mm in the spring. m= 60 kg. s=750mm(a) Find the kinetic coefficient of friction between the surface and the box.(b) Find the velocity of the box as it moves back from its original position.
The figure depicts two pucks on a frictionless table. Puck 2 is four times as massive as puck 1. Starting from rest, the pucks are pushed by two equal forces. 1-Which pucks will have the grater kinetic energy upon reaching the finish line? 2- Which puck will reach the finish time first ?
A freight train is being assembled in a switching yard. Car 1 has a mass of m1 = 64x10^3 kg and moves at a velocity of 1 m/ s. Car 2, with a mass of m2= 87x10^2 kg and a velocity of 1 m/ s, overtakes car 1 and couples to it. Neglecting friction, find the common velocity vf of the cars after they become coupled.
4. A concrete weight of 125 kg is released from standstill and a log of mass 200 kg is moved along an inclined area of 30° to the horizontal.When the concrete weight is moved down 5 m, find that 1. What is the speed of the log? 2. What is the movement time of the concrete drum?
In a porter governor the mass of the central load is 18 kgand the mass of each ball is 2kg. the top arms (254) mm while the bottom arms are (304) mm long. The friction of the sleeve is 20 N. If the top arms make 45 deg with the axis of rotation in the equilibrium position, find the range of the speed of the governor in that position
3. Blocks AA and BB of mass 10 kg and 4 kg respectively, are placed on the inclined plane and released. The coefficients of kinetic friction between the blocks and the inclined plane are μAμAmuA = 0.1 and μBμBmuB = 0.5. Neglect the mass of the link
3 - In the figure, the 200-lb crate is being pulled up the slope by the motor M. If the velocity of the point P is 2s³ ft/s (where s is the displacement of the crate), and the coefficient of kinetic friction between the crate and the slope is u = 0.2, what will the towing force applied by M be when the box has moved 10 ft up the slope?