5. (a) The weight of the block in the diagram is 54 N. The coefficient of static friction between the block and the vertical wall is 0.570. What minimum magnitude of the force F is required to prevent the block from sliding down the wall? (Note that the static frictional force is directed upward, parallel to the wall) Block F40.0° Vertical wall (b) A 104 kg baseball player slides into second base. The coefficient of kinetic friction between the player and the ground is μ = 0.651. (i) What is the magnitude of the frictional force? (ii) If the player comes to rest after 1.13 s, what is his initial speed?

5. (a) The weight of the block in the diagram is 54 N. The coefficient of static friction between the block and the vertical wall is 0.570. What minimum magnitude of the force F is required to prevent the block from sliding down the wall? (Note that the static frictional force is directed upward, parallel to the wall) Block F40.0° Vertical wall (b) A 104 kg baseball player slides into second base. The coefficient of kinetic friction between the player and the ground is μ = 0.651. (i) What is the magnitude of the frictional force? (ii) If the player comes to rest after 1.13 s, what is his initial speed?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

Problem 3: A 38.8-kg crate is being pushed at a constant speed by a force of 311 N at an angle of 29 degrees below the horizontal, as shown. Part (a) What is the coefficient of kinetic friction between the crate and the floor? Numeric : A numeric value is expected and not an expression. Uk = Part (b) If the force is pulling at 29 degrees above the horizontal instead of below, as shown, what is the acceleration of the crate in m/s2, assuming the coefficient of friction is the same as in the previous part? Numeric : A numeric value is expected and not an expression. a =
A 2.03 kg book is placed on a flat desk. Suppose the coefficient of static friction between the book and the desk is 0.482 and the coefficient of kinetic friction is 0.262. How much force is needed to keep the book moving at a constant speed once it begins moving?
A block 5.0 kg is on an inclined plane. If the friction coefficient (static and kinetic) between the block and the plane is μ = 0.5, and the angle θ = 35°, determine the maximum friction force that the plane could exert on the block. The block is not necessarily at rest. Use g = 10 N/kg.
A rope exerts a force of 50 N on a box to keep it stationary. If the box is on a plane inclined 25° from the horizontal and the coefficient of static friction is 0.29, calculate the normal force exerted on the box.
A 78 kg crate rests on a rough horizontal surface. The coefficient of static friction and coefficient of kinetic friction are 0.3 and 0.2, respectively. What would happen if the applied horizontal force is 300 N? Choices: It will remain at rest. The frictional force will be neglected. It will accelerate in the same direction as the horizontal force. It will accelerate in the opposite direction as the horizontal force.
A block (mass = 200.00 g) is placed on an inclined plane 45 degrees from the horizontal. The coefficient of static and kinetic friction between the block and the plane are 0.54 and 0.35, respectively. What is the frictional force between the block and the plane?
A 423 N crate rests on a ramp; the maximum angle just before it slips is 26.4° with the horizontal. What is the coefficient of static friction between crate and ramp surfaces?
A box is placed on top of a 30-degree inclined plane that has 0.10 as its coefficient of static friction. What is the mass of the box if a horizontal force of 90 pound is applied to the box to prevent it from sliding downward? Assume that the horizontal force is parallel to the inclination.
The upper leg muscle (quadriceps) exerts a force of 1220 N , which is carried by a tendon over the kneecap (The patella) at the angle shown in figure 5.43. Find the magnitude and direction of the force exerted by the knee cap on the upper leg bone ( the femur ) . n? degree (counter clockwise from an axis directed to the left ) ?
A 26.8 kg box sits on a ramp at an angle of 13° above the horizontal. If the coefficient of static friction between the box on the ramp is 0.215, what minimum applied force is required to keep the box at rest?
Block B in the figure weighs 763 N. The coefficient of static friction between block and table is 0.21; angle 0 is 35°; assume that the cord between B and the knot is horizontal. Find the maximum weight of block A for which the system will be stationary. Number i Units B Knot- A Te
Calculate the ratio of the drag force on a jet flying at 885 km/h at an altitude of 8.6 km to the drag force on a prop-driven transport flying at half that speed and altitude. The density of air is 0.46 kg/m³ at 8.6 km and 0.71 kg/m³ at 4.3 km. Assume that the airplanes have the same effective cross-sectional area and drag coefficient C. Number i Units