The mB = 8 kg block is moving to the right with a velocity of vo = 0.96 mls on a horizontal surface when a force P is applied to it at time t = 0 as shown in the following figure. The coefficient of kinetic friction between the block and the surface is Hk = 0.27. Use P = 38, P2 = 72, t1 = 0.15, t2 = 0.35. %3D Р, N P2 P mB P1 t, s t1 t1 Calculate the velocity v in m/s of the block when t = 0.35 s. Insert your answer correct up to at least a third decimal place.

The mB = 8 kg block is moving to the right with a velocity of vo = 0.96 mls on a horizontal surface when a force P is applied to it at time t = 0 as shown in the following figure. The coefficient of kinetic friction between the block and the surface is Hk = 0.27. Use P = 38, P2 = 72, t1 = 0.15, t2 = 0.35. %3D Р, N P2 P mB P1 t, s t1 t1 Calculate the velocity v in m/s of the block when t = 0.35 s. Insert your answer correct up to at least a third decimal place.

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 7.81P: Calculate the horizontal force P required to push the 85-lb lawn mower at constant speed. The center...

See similar textbooks

Similar questions

The figure shows a junction of mass m = 10kg sliding on a rod in a vertical plane. Positioned 1 simpai is stationary and horizontal spring and tensioned Fp = 300N. If the spring constant is k = 1kN/m and the average frictional force between the rod and the junction is F = 30N. Calculate the speed at position 2. (Ans: 3.47m/s)
A spring is used to stop the box A which weighs 650 N and is sliding down from an inclined plane with friction and 40 degrees angle. The spring constant is 18 kN/m. The spring is pressed to 3 cm with using wires at the beginning. When the box is L=8 m away from the box, its velocity is V=11 m/s. What is the extra pressed distance of the spring when the box is stopped? The friction coefficient of the plane is 0.22.
If there is no friction between shaft AB and the collar, what angular velocity Ö must the mechanism have to keep the collar at r= 660 mm from the vertical axis? Consider the same mechanism again, with m = 3.3 kg, d = 275 mm, k = 180 N/m, only now, instead of being smooth, the collar and shaft have a maximumcoefficient of friction of 0.74. What is the minimum angular velocity required to keep the collar at a constant distance r= 660 mm from the axis of rotation?
A car travelling in a constant velocity wants to turn in a 10m radius flat curve. If the coefficients of static and dynamic friction are 0.4 and 0.2, respectively, determine the car's velocity in kph.
200lp box is at rest in the beginning on horizontal surface and force T=100lb and P applied shown. coefficient of static and kinetic friction is us= 0.3 and uk=0.2. find acceleration of block if p=100lb and p=250lb
consider the mass and pulley system in the attached file. mass m1 = 29 kg and mass m2 = 12kg. the angle of the inclined plane is given and the coefficient of kinetic friction between mass m2 and the inclined plane is uk = 0.12. assume the pulleys are massless and frictionless when mass m2 moves a distance 4.94 m up the ramp, how far downward does mass m1 move? d= ?
An 8 kg and a 2 kg block are attached to a pulley system as shown in the picture and a force is being applied to the left. If the 2 kg block is accelerating upward at 1.2 m/s2 , what is the force used to pull the blocks? There is no friction between the 8 kg block and the surface its moving across and you can assume the rope is massless and the pulley is massless and frictionless. a) 78.4 N b) 19.6 N c) 31.6 N d) 98.0 N
A force P pulls a series of blocks initially at rest as shown in the figure where all cords are frictionless and incompressible, and all pulleys are frictionless. The 8-kg Block 1 is attached to a 5-kg Block 2. The coefficients of friction between Block 1 and the horizontal surface are 0.38 (static) and 0.27 (kinetic), while between Block 2 and the surface inclined at 28° are 0.40 (static) and 0.31 (kinetic). a. Determine the angle θ at thich Block 1 is being pulled to just get it moving if force P is 71.2 N. b. If the blocks are pulled with a force of 100 N at the same angle, how fast are the blocks moving after 3 seconds? c. What is the total distance travelled?
A car weighing W1 starts moving from the point A of the inclined plane that makes an angle α with the horizontal, hitting the block B, which is at a distance of ℓ, and move smoothly. Since the kinematic friction coefficient µk between the block B and the inclined plane is µk, find the “X” distance where the car and block will stop. W1=W2; ℓ=10 m; µk=0.5; α= 12°
A speedboat with a mass of 529 kg (including the driver) is tethered to a fixed buoy by a strong 28.3 m cable. The boat's owner loves high speed, but does not really want to go anywhere. So the owner revs up the boat's engine, makes a lot of noise, and runs the boat in circles around the buoy with the cable supplying all the necessary centripetal force. When the tension of the cable is steady at 12300 N, with what force is the boat's engine pushing the boat? Different physics textbooks treat drag force somewhat differently and use different formulas. For the present purpose, take the water's drag force on the boat to be (450 kg/m)×v2, where v denotes the boat's speed. Ignore any drag force on the cable. What is the force of the engine?
Block A of 500-kg mass is subjected to a towing force F= 2000 t^2 + 3000 t N where "t" is in seconds. If the initial velocity of the block is 6 m/s, determine the velocity after 4 seconds. The block is being towed at a surface inclined at 45 degrees and the coefficient of kinetic friction between these is 0.2. Answer: 106.04 m/s Show COMPLETE STEP-BY-STEP SOLUTIONS and NECESSARY FIGURES to satisfy the answer. Thank you
A block weighing 2.50 kg begins its motion from a stationary position at point A, located at the highest point of a frictionless ramp. The ramp is inclined at an angle of 40° relative to the horizontal and has a length of 1.50 m. As the block slides down the ramp, it reaches a region between point B and point C, which is a rough horizontal surface with a kinetic friction coefficient of 0.30. After covering a distance of 1.00 m on the horizontal surface, the block encounters a lightweight spring with a spring constant of 900 N/m. A. Find the total energy for point A and point B? B. Find the speed of the block at point B? C. What is the cumulative work performed on the block as it moves along the rough horizontal surface? D. By employing the work-energy theorem, determine the velocity of the block at point C just before it collides with the spring?