Next, consider the case where the block is suspended on an inclined surface by the same massless spring, as shown below. The free-body diagram for the block is also provided below. Notice that the surface makes an angle (0 ) of 22.0° and the force of friction, f points up the incline (as shown in the free-body diagram). What is the force of friction on the block if the spring is pulled up the incline by stretching it 0.520 m from its relaxed equilibrium length, assuming that the block is at rest? Answer in units of newtons (N), with 3 sig figs.

Next, consider the case where the block is suspended on an inclined surface by the same massless spring, as shown below. The free-body diagram for the block is also provided below. Notice that the surface makes an angle (0 ) of 22.0° and the force of friction, f points up the incline (as shown in the free-body diagram). What is the force of friction on the block if the spring is pulled up the incline by stretching it 0.520 m from its relaxed equilibrium length, assuming that the block is at rest? Answer in units of newtons (N), with 3 sig figs.

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 7.3P: Two identical chairs, each weighing 14 lb, are stacked as shown. The center of gravity of each chair...

See similar textbooks

Similar questions

A body of mass 30 kg is resting on a horizontal plane. A pull of 80 N is subjected on the body and tends the body to move. Will the body move if coefficient of friction between the body and the plane is 0.3.
A block of mass 60 kg is to be accelerated upwards along a plane inclined at 10° to the horizontal by force Fp, which is parallel to the plane and has a magnitude of 420 N. The coefficient of friction is 0.25. Calculate the normal force and the frictional force of the block. The answer Fn= 579.66N Ff=144.93N
A boy is pulling a sled with a box (at constant ve- locity) up an inclined surface as shown in Fig. mass of the box and sled is 50 kg; the mass of the boy is 40 kg. If the coefficient of kinetic friction between the sled run- ners and the icy surface is 0.05, determine the minimum coefficient of static friction needed between the boy's shoes and the icy surface. The 25 G. 15
Three rectangular boxes are stacked on top of each other. All the boxes have the same mass of 1.2 kg. The kinetic coefficients of friction between the boxes are all 0.6 and the static coefficient of friction is 0.7. There is no friction between the bottom box and the floor. A rope is attached to the lowest box and pulls on the lowest box with a force of 5.0 N. Is the friction between the boxes static or kinetic?
A box of mass m = 30 kg is at rest on a ramp inclinedat 50° to the horizontal. The coefficients of friction between the box and the ramp are mS = 0.80 and mK = 0.70. Determine the magnitude of the largest force that can be applied upward, parallel to the ramp, if the box is to remain at rest.
A weight of 10 N resting on an inclined plane at 30° to the horizontal is connected by a string passing over a frictionless pulley at the upper end of the inclined plane. The free end of the string is connected to a weight of 20 N which hangs in air. If the coefficient of friction of the inclined surface is 0.2, calculate the time taken by the hanging weight to decend by 1 m. (1) VON u=0.2 (2) 30° 20N Given diagram Fig s=1m
Three blocks with masses ma = 25 kg, mg = 50 kg, and mc = 100 kg are connected with a flexible cable that passes over a frictionless pulley as shown in Fig. Determine the force P required to start moving the blocks if the coefficient of friction is 0.50 between blocks A and B, 0.35 between block B and the surface, and 0.26 between block C and the surface. P
A weight of 10 N resting on an inclined plane at 30° to the horizontal is connected bya string passing over a frictionless pulley at the upper end of the inclined plane. The free end of the string is connected to a weight of 20N which hangs in air. If the coefficient of friction of the inclined surface is 0.2, calculate the time taken by the hanging weight to decend by 1 m. (1) ON u=0.2 (2) 30 20N Given diagram Fig s=1m
A 6.00 kg block is pressed against a vertical wall by a force. The coefficient of static friction between the block and wall is 0.41 and the directional angle theta for the force is 48 degrees. Determine the magnitude of the force when the block is about to slide down the wall.
A 150 lb man can climb up15 ft on a 20 ft ladder before it slips. What must the coefficient of friction be if the ladder is arranged so that its base makes an angle of 50 ̊ with the ground? Assume the ladder to be uniform and weighing 100 lb.
Two blocks with masses ma = P kg and mg = 100 kg are connected with a flexible cable that passes over a frictionless pulley as shown in Fig. The coefficient of friction between the blocks is 0.2. If motion of the blocks is impending, determine the coefficient of friction between block B and the inclined surface and the tension in the cable between the two %3D blocks. the force for P is 78kg A B 40°
A 70 pound object needs to be lifted vertically one foot. You Have a 2-inch diameter piston actuator with a 12-inch stroke connected to a 50 psi source of pressurized air. The mass is restricted by a set of guide rails, which limit it's vertical motion, and which uses roller bearings with a friction coefficient of 0.002. Can the object be lifted? How long will it take? O yes, 0.24 seconds O yes, 0.73 seconds O yes, 0.12 seconds no