In a mail-sorting facility, a 2.50-kg package slides down an inclined plane that makes an angle of 24.0' with the horizontal. The package has an initial speed of 2.00 m/s at the top of the incline, and it slides a distance of 15.0 m. 1) What must the coefficient of kinetic friction between the package and the inclined plane be so that the package reaches the bottom with no speed?
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- 4. A box slides along a horizontal floor with an initial speed of 2.5 m/s. It comes to rest after sliding 1.4 m. Find the coefficient of kinetic friction. (g=9.8 ms?)A block weighing 80N rests on a plane inclined at 20o to the horizontal. The coefficient of static friction is 0.25, while the coefficient of kinetic friction is 0.15. a) What is the minimum force |F|, parallel to the plane, that will prevent the block slipping down the plane? b) What is the minimum force |F| that will start the block moving up the plane? c) What force |F| is required to move the block up the plane at constant speed?A 620 kg packing crate is being pulled up a 16 degrees-inclined plane by a rope. The rope is parallel to the incline. The coefficient of kinetic friction is 0.3. (a) What is the size of the normal force acting on the crate? N (b) What is the size of the kinetic friction force acting on the crate? N (c) What is the size of the tension force if the crate is moving with constant velocity?
- While loading furniture into a truck, you push a 1.56 kg chair up a 14.7 degree ramp, with a horizontal force of 12.1 N. How long does it take to reach a speed of 4 m/s, starting from rest? The coefficient of kinetic friction chair - ramp is 0.345.Page of 2 4. A 5.70-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.400. Determine the kinetic frictional force that acts on the box when the elevator is accelerating downward with an acceleration whose magnitude is 1.10 m/s?. 5. During a wrestling match, a 150 kg wrestler briefly stands on one hand during a maneuver designed to perplex his already moribund adversary. By how much does the upper arm bone shorten in length? The bone can be represented by a uniform rod 38.0 cm in length and 2.10 cm in radius. (Y=9 x 10° N/m?) MacBook Pro DD F3 F5 F6 F7 Fa F9 F10 %23 & 3 4. 7 8 R T Y PA small vochito of mass 607 kg breaks down as it climbs a hill with an angle of inclination of 17° hel. coefficient of friction between the car and the surface is 0.75. What is the magnitude of its acceleration as it moves down the ramp?
- *63. ssm A 44-kg chandelier is suspended 1.5 m belov wires, each of which has the same tension and the sa (see the drawing). Find the tension in each wire. 1.5 m 2.0 mMany birds can attain very high speeds when diving. Using radar, scientists measured the altitude of a barn swallow in a vertical dive; it dropped 208 m in 3.0 s. The mass of the swallow was estimated to be 0.018 kg, and its cross-section area as 5.6 x 10-4 m2. What was the drag coefficient for this swallow as it dove?A constant force Fa pushes a 22.5-kg box across a rough horizontal surface. The magnitude of Fa is 185 N and the force is inclined at an angle of θ = 30.0° below the horizontal. The coefficient of kinetic friction between the box and the surface is μk = 0.500. What is the magnitude of the box's acceleration?
- Ch.5 Problem 821. A car is moving at 65 kph along a straight road. When brakes are applied, it takes 6 seconds for the car to stop drifting. Find the minimum coefficient of friction between the wheels and the road.A 5.00-kg box is initially at rest on a level surface. The coefficient of static friction between the box and the surface is 0.400. Calculate the maximum force you can apply before the box starts to move, if the force is directed at an angle of 30 degrees from the horizontal, with the vertical component downward. Calculate the maximum force you can apply before the box starts to move, if the force is directed at an angle of 30 degrees from the horizontal, with the vertical component upward.