Q1) A 5 kg block initially at rest is pulled to the right along a horizontalsurface by a constant horizontal force of 12 N.(A) Find the speed of the block after it has moved 4 m if the surfaces in contacthave a cocfficient of kinctic friction of 0.15 as shown in Figure (a).(B) Suppose the force F is applied at an angle 6 as shown in Figure (b). Atwhat angle should the force be applied to achieve the largest possible kineticenergy?(а)(b)

Answered: Image /qna-images/answer/2fe447dc-76cd-4e45-80e5-4da178399ad6.jpg

Q1) A 5 kg block initially at rest is pulled to the right along a horizontal surface by a constant horizontal force of 12 N. (A) Find the spced of the block after it has moved 4 m if the surfaces in contact have a coefficient of kinctic friction of 0.15 as shown in Figure (a). (B) Suppose the force F is applied at an angle 6 as shown in Figure (b). At what angle should the force be applied to achieve the largest possible kinetic energy? (а) (b)

Q1) A 5 kg block initially at rest is pulled to the right along a horizontal surface by a constant horizontal force of 12 N. (A) Find the spced of the block after it has moved 4 m if the surfaces in contact have a coefficient of kinctic friction of 0.15 as shown in Figure (a). (B) Suppose the force F is applied at an angle 6 as shown in Figure (b). At what angle should the force be applied to achieve the largest possible kinetic energy? (а) (b)

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 7.78P: The figure shows a steel bar being processed by a rolling mill. Given that P=80kN and r =0.016,...

See similar textbooks

Similar questions

In the given figure below, a 3.0 -kg block is sliding down a 60o-rough incline. The speed of the block is 1.68 m/s at the instant it is 5.25 m from an uncompressed spring located at the other lower end of the incline. The spring has a spring or stiffness constant of 120 N/m and the coefficient of kinetic friction between the block and the incline is 0.35. (a) At what speed (in m/s) will the block strike the spring? (b) What would be the maximum compression (in m) of the spring?
To climb a 400 meter high mountain, you have two options, a straight line route with a 40 ° slope or a route composed of 5 equal sections (same length) each with a 20 ° slope. If traveling in a car with a mass of 1280 kg and a maximum power of 88 kW, Determine (assume the whole car as a particle): a) Is the friction enough to prevent the car from sliding? The coefficient of static friction of the tires with the ground is 0.95. b) What is the power required to climb the 40 ° slope at a constant speed of 40 km / h? Does the car have enough power to go up at that speed? c) What is the constant speed at which the 40 ° slope can be climbed with a 60 kW power? d) What is the power required to climb a 20 ° slope at 40 km/h? Does the car has enough power to go up at that speed? e) In which of the two trajectories does the car do more work? Ignore the resistance of the air and rolling resistance and radius of curves between sections of the compound route. Please add the free body diagram.
1) Jonny pulls his sister Jane (weight 28 lbs), who is sitting in a wagon, up an incline ramp (θ = 17°) with a steady speed. If the coefficient of kinetic friction is 0.18, the wagon has a mass of 14 kg, and the length of the ramp is 2.4 m, find: the work done by the frictional force. the work done by the gravitational force.
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?
In the figure, m1 = 10kg and m2= 4.0 kg. the coefficient of static friction between m1 and the horizontal surface is 0.50 and the coefficient of kinetic friction is 0.30. a) id the system is set in motion with m2 moving downward, how much will be the acceleration of the system and the tension of the rope? g= 10m/s2
A 200-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 34.5° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.870, and the log has an acceleration of 0.750 m/s2. Find the tension in the rope.
In the figure above, blocks A and B have 50 and 10 kg respectively. It is given that thecoefficients of friction between all surfaces of contact are static friction=0.4 and kinetic friction=0.3.a) If P=0, determine the acceleration of B and the tension in the chord?b) If P=10, determine the acceleration of B and the tension in the chord?c) If P=100, determine the acceleration of B and the tension in the chord?
A 119.23-kg skier starts with an initial speed of 29.22 m/s and coasts up a H=6.10-m-high rise as shown in the figure. If her final speed at the top is 14.35 m/s, what is the angle of the slope in unit of degrees? Assume the coefficient of friction between her skis and the snow is 0.10 (Hint: Find the distance traveled up the incline assuming a straight-line path as shown in the figure.) Use g = 10 m/s2.
When a car brakes hard and skids, the maximum deceleration is 6 m/s2. The coefficient of friction between tires and road is _____.
A box slides down a 30° ramp with an acceleration of 1.2 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.
In figure 2 show below, the body reaches a velocity of 12 m/ sec during traveling 30 m starting from rest moving with constant acceleration. Find the coefficient of friction between the body and ground? P =300 N , W = 200 N
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= ?