A 313-kg crate rests on a surface that is inclined above the horizontal at an angle...
A 313-kg crate rests on a surface that is inclined above the horizontal at an angle of 17.0°. A horizontal force (magnitude = 414 N and parallel to the ground, not the incline) is required to start the crate moving down the incline. What is the coefficient of static friction between the crate and the incline?
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A 313-kg crate rests on a surface that is inclined above the
horizontal at an angle...
15. A 12-kg crate rests on a horizontal surface and a boy pulls on it with...
15. A 12-kg crate rests on a horizontal surface and a boy pulls on it with a force that is 30° below the horizontal. If the coefficient of static friction is 0.40, the minimum magnitude force he needs to start the crate moving is: A) 44 N B) 47 N C) 54 N D) 56 N E) 71 N
A 15.0-g coin slides upward on a surface that is inclined at an angle of 12.0°...
A 15.0-g coin slides upward on a surface that is inclined at an angle of 12.0° above the horizontal. The coefficient of kinetic friction between the coin and the surface is 0.230; the coefficient of static friction is 0.350. Find the magnitude and direction of the force of friction under the following circumstances. (a) when the coin is sliding ______ N (parallel to the incline, down the incline, or up the incline) b) after it comes to rest. (Note: One method...
A woman exerts a horizontal force of 141 N on a crate with a mass of...
A woman exerts a horizontal force of 141 N on a crate with a mass of 30.7 kg (a) If the crate doesn't move, what's the magnitude of the static friction force (in N)? (b) What is the minimum possible value of the coefficient of static friction between the crate and the foor? (ASsume the crate remains stationary.) A block of mass 59.1 kg rests on a slope having an angle of elevation of 20.3. If pushing downhill on the...
1. A person exerts a horizontal force of 125 N on a crate with a mass...
1. A person exerts a horizontal force of 125 N on a crate with a mass of 30.0 kg. a. If the crate doesn't move, what's the magnitude of the static friction force? b. What is the minimum possible value of the coefficient of static friction between the crate and the floor? 2. A horse is hamessed to a sled having a mass of 236 kg, including supplies. The horse must exert a force exceeding 1.240 N at an angle...
A loaded penguin sled weighing 89.0 N rests on a plane inclined at angle θ = 21.0° to the...
A loaded penguin sled weighing 89.0 N rests on a plane inclined at angle θ = 21.0° to the horizontal (see the figure). Between the sled and the plane, the coefficient of static friction is 0.260, and the coefficient of kinetic friction is 0.130. (a) What is the minimum magnitude of the forceF→, parallel to the plane, that will prevent the sled from slipping down the plane? (b) What is the minimum magnitude F that will start the sled moving up the plane? (c) What value of F is required to move the sled up...
4. + -/0.9 points A 29.kg crate rests on a horizontal floor, and a 63-kg person...
4. + -/0.9 points A 29.kg crate rests on a horizontal floor, and a 63-kg person is standing on the crate. (a) Determine the magnitude of the normal force that the floor exerts on the crate. (b) Determine the magnitude of the normal force that the crate exerts on the person. Additional Materials Section 4.9 5. -/0.9 points A 53.0-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.780 and...
A loaded penguin sled weighing 64 N rests on a plane inclined at 20° to the...
A loaded penguin sled weighing 64 N rests on a plane inclined at 20° to the horizontal. Between the sled and the plane the coefficient of static friction is 0.20, and the coefficient of kinetic friction is 0.17. (a) What is the minimum magnitude of the force , parallel to the plane, that will prevent the sled from slipping down the plane? ___N (b) What is the minimum magnitude F that will start the sled moving up the plane? ___...
A loaded penguin sled weighing 80 N rests on a plane inclined at20° to the...
A loaded penguin sled weighing 80 N rests on a plane inclined at
20° to the horizontal. Between the sled and the plane the
coefficient of static friction is 0.26, and the coefficient of
kinetic friction is 0.17.What is the minimum magnitude of the force F, parallel to the
plane, that will prevent the sled from slipping down the
plane?What is the minimum magnitude F that will start the sled moving up
the plane?What value of F is required to...
A block of mass 3.0 kg rests on an inclined plane that makes an angle withthe...
A block of mass 3.0 kg rests on an inclined plane that makes an angle withthe horizontal of 25◦. If the maximum friction force between the block and the surfaceis 11.6 N, find the coefficient of static friction.
9. A 1.90 kg box rests on a plank that is inclined at an angle of...
9. A 1.90 kg box rests on a plank that is inclined at an angle
of 29° above the horizontal. The upper end of the box is attached
to a spring with a force constant of 18 N/m, as shown in the
figure. If the coefficient of static friction between the box and
the plank is 0.79, what is the maximum amount the spring can be
compressed and the box remain at rest?
15. A 12-kg crate rests on a horizontal surface and a boy pulls on it with a force that is 30° below the horizontal. If the coefficient of static friction is 0.40, the minimum magnitude force he needs to start the crate moving is: A) 44 N B) 47 N C) 54 N D) 56 N E) 71 N
A woman exerts a horizontal force of 141 N on a crate with a mass of 30.7 kg (a) If the crate doesn't move, what's the magnitude of the static friction force (in N)? (b) What is the minimum possible value of the coefficient of static friction between the crate and the foor? (ASsume the crate remains stationary.) A block of mass 59.1 kg rests on a slope having an angle of elevation of 20.3. If pushing downhill on the...
1. A person exerts a horizontal force of 125 N on a crate with a mass of 30.0 kg. a. If the crate doesn't move, what's the magnitude of the static friction force? b. What is the minimum possible value of the coefficient of static friction between the crate and the floor? 2. A horse is hamessed to a sled having a mass of 236 kg, including supplies. The horse must exert a force exceeding 1.240 N at an angle...
4. + -/0.9 points A 29.kg crate rests on a horizontal floor, and a 63-kg person is standing on the crate. (a) Determine the magnitude of the normal force that the floor exerts on the crate. (b) Determine the magnitude of the normal force that the crate exerts on the person. Additional Materials Section 4.9 5. -/0.9 points A 53.0-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.780 and...
A loaded penguin sled weighing 80 N rests on a plane inclined at
20° to the horizontal. Between the sled and the plane the
coefficient of static friction is 0.26, and the coefficient of
kinetic friction is 0.17.What is the minimum magnitude of the force F, parallel to the
plane, that will prevent the sled from slipping down the
plane?What is the minimum magnitude F that will start the sled moving up
the plane?What value of F is required to...
9. A 1.90 kg box rests on a plank that is inclined at an angle
of 29° above the horizontal. The upper end of the box is attached
to a spring with a force constant of 18 N/m, as shown in the
figure. If the coefficient of static friction between the box and
the plank is 0.79, what is the maximum amount the spring can be
compressed and the box remain at rest?
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