To push a crate from point A to point B at the door of a warehouse, a resultant force of 2500 N is needed. To accomplish this, Pedro Juancho, and Joe Marie volunteered to push the crate. If Pedro exerts 750 N and Juancho exerts 1500 N in the direction shown, determine the force that Jose Marie must exert to move the crate to desired location. WAREHOUSE в Pedro 15 m 20 m Jose Marie Juancho 20

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You and your friend are moving a 82kg box across the floor at a constant speed.  You are pushing on the crate parallel to the ground with a force of 62N.  Your friend has a rope tied to the box and they are pulling it at an angle of 37° to the ground with a force of 32N. Construct the free body diagram showing the force acting on the crate in order to find the magnitude of friction the floor exerts on the box.

Between two ski hills, there is a valley. Hill l is 735m and the second hill is 625m. From point A to point B, a skier skis. The skier starts at rest at point A and finishes at rest at point B. Between the two points, the total length of the path is 4.11m with an average slope of 40 degrees from the horizontal. a) Sketch the free body diagram and show all the forces on the skier. Indicate the location where the gravitational potential energy is equal to zero on the diagram. b) assuming the system is skier and the earth, and there is friction involved between the ski and the snowy ground ( coefficient of kinetic friction), determine the thermal energy that is lost to the surrounding when the skier is skiing from point A to point B in terms of variables, m, L and theta c) Calculate the value of coefficient of kinetic friction between snow and ski which would make the skier stop at the top of the lower point B

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

With no losses in the string-pulley system, calculate the force. Help please?

O Macmillan Learning Calculate the final speed vf of a 2.00-kg object that is pushed for 28.0 m by a 40.0-N force directed 30.0° below the horizontal on a level, frictionless floor, as shown in the figure. Assume the object starts from rest. Uf = m/s 30° F d 2.00 kg 12