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A uniform ladder 10.o m long weighing 50.0 N rests against a smooth wall (no frictional force between ladder and wall). If the coefficient of static friction is .360 and makes a 60 degree angle with respect to the horizontal, what is the frictional force and how far along the ladder can a 70.0 kg painter climb before ladder begins to slip?

A uniform ladder 10.o m long weighing 50.0 N rests against a smooth wall (no frictional force between ladder and wall). If the coefficient of static friction is .360 and makes a 60 degree angle with respect to the horizontal, what is the frictional force and how far along the ladder can a 70.0 kg painter climb before ladder begins to slip?

College Physics
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)...
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A uniform ladder 10.o m long weighing 50.0 N rests against a smooth wall (no frictional force between ladder and wall). If the coefficient of static friction is .360 and makes a 60 degree angle with respect to the horizontal, what is the frictional force and how far along the ladder can a 70.0 kg painter climb before ladder begins to slip?

4. A uniform ladder 10.0 m long and weighing 50.0 N rests against a smooth wall (Note: a smooth wall means that there is no frictional force between the ladder and the wall), as shown in the figure below. If the coefficient of static friction between the ladder and the ground is 0.360 and the ladder makes a 60.0° angle with respect to the horizontal, how far along the length of the ladder can a 70.0-kg painter climb before the ladder starts to slip? (a) 6.33 m (b) 5.24 m (c) 2.78 m (d) 4.99 m SMOOTH WALL ( Hs =0) ladday 60.0° (GROUND (=0. 360) 5. At what maximum speed can a car manage a turn on a wet, level road with coefficient of static friction 0.230 without sliding out of control? The radius of the turn is 25.0 m. (a) 11.8 m/s (b) 7.51 m/s (c) 5.67 m/s (d) 8.90 m/s 6. An ice skater is able to make a triple-spins in the air before landing on the ice field safely is because of the following physical law: (a) Conservation of mechanical energy (b) Conservation of kinetic energy (c) Conservation of linear momentum (d) None of the above 7. AF-35 stealth fighter jet traveling at a constant speed of 1.20 x 102 m/s executes a vertical loop with a radius of 5.00 x 10² m. If the mass of the pilot is 70.0 kg, the magnitude of the force exerted on the pilot by the seat at the bottom of the loop is (a) 2.70 x 103 N (b) 5.45 x 102 N (c) 1.89 x 104 N (d) 3.14 x 10' N
Transcribed Image Text:4. A uniform ladder 10.0 m long and weighing 50.0 N rests against a smooth wall (Note: a smooth wall means that there is no frictional force between the ladder and the wall), as shown in the figure below. If the coefficient of static friction between the ladder and the ground is 0.360 and the ladder makes a 60.0° angle with respect to the horizontal, how far along the length of the ladder can a 70.0-kg painter climb before the ladder starts to slip? (a) 6.33 m (b) 5.24 m (c) 2.78 m (d) 4.99 m SMOOTH WALL ( Hs =0) ladday 60.0° (GROUND (=0. 360) 5. At what maximum speed can a car manage a turn on a wet, level road with coefficient of static friction 0.230 without sliding out of control? The radius of the turn is 25.0 m. (a) 11.8 m/s (b) 7.51 m/s (c) 5.67 m/s (d) 8.90 m/s 6. An ice skater is able to make a triple-spins in the air before landing on the ice field safely is because of the following physical law: (a) Conservation of mechanical energy (b) Conservation of kinetic energy (c) Conservation of linear momentum (d) None of the above 7. AF-35 stealth fighter jet traveling at a constant speed of 1.20 x 102 m/s executes a vertical loop with a radius of 5.00 x 10² m. If the mass of the pilot is 70.0 kg, the magnitude of the force exerted on the pilot by the seat at the bottom of the loop is (a) 2.70 x 103 N (b) 5.45 x 102 N (c) 1.89 x 104 N (d) 3.14 x 10' N
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