5. A 50 kg block rests on a rough plane inclined 30° with the horizontal. The coefficient of sliding friction between block and plane is 0.25. What force P parallel to the plane is required to keep the block moving up the plane at constant velocity?
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- 9. A 75 N crate is at rest on an incline that is inclined a 25° above the horizontal. The coefficient of static friction between the crate and the incline is 0.25 and the coefficient of kinetic friction between the crate and the incline is 0.15. (a) What is the minimum magnitude of a force parallel to the incline that will prevent the crate from sliding down the incline? (b) What is the minimum magnitude of the force parallel to the incline that will start the crate to move up the incline? (c) Include a force (or free body) diagram of each situation.A 8 kg decoration hangs from the ceiling. It is suspended by 2 wires. The first wire forms a 40⁰ angle with the ceiling. The second wire forms a 50⁰ angle with the ceiling.a. Find the tension in the 2 wires (including magnitude and direction) b. Assuming the wire that forms the 40⁰ angle with the ceiling has a length of 0.3 metres, how farbelow the ceiling is the decoration suspended?answer in 20 mins!!!
- MY NOTES ASK YOUR TEACHER A Mercedes-Benz 300SL (m = 1750 kg) is parked on a road that rises 20° above the horizontal. (a) What is the magnitude of the normal force? X N 16.1 8 9. (b) What is the static frictional force that the ground exerts on the tires? 5.86 Additional Materials 6. D eBook Submit Answer ?? TOO 2,197 MacBook Air %23 3 4 2 E RO H. D F 3. 2.1O C A cart for hauling ore out of a gold mine has a mass of 439 kg , including its load. The cart runs along a straight stretch of B Track track that climbs a shallow 4.75° incline. A donkey, which is Rope trudging along and to the side of the track, has the unenviable job of pulling the cart up the slope with a 441 N force for a distance of 185 m by means of a rope that is parallel to the slope but makes an angle of 14.5° with the track. A „Track incline Model the rolling resistance of the cart as though it were Horizontal ground sliding on the track with a coefficient of friction of 0.0163. Use g = 9.81 m/s, and note that angle A in the image is the angle of the incline while angle B is the angle the rope makes %3D with the track. Find the work Wa that the donkey performs on the cart during this process. %3D Find the work W, that the force of gravity performs on the cart during this process. = "M Calculate the work W done on the cart by friction during this process. 87