Shown below is a waterslide constructed in the late 1800's. This slide was unique for its time due to the fact that a large number of small wheels along its length made friction negligible. Riders rode a small sled down the chute which ended with a horizontal section that caused the sled and rider to skim across the water much like a flat pebble. The chute was 9.76 m high at the top and 54.3 m long. Consider a rider and sled with a combined mass of 75.0 kg. They are pushed off the top of the slide from point A with a speed of 2.05 m/s, and they skim horizontally across the water a distance of 50 m before coming to rest. 9.76 m Engraving from Scientific American, July 1888 B -54.3 m- (a) N 20.0 m -50.0 m- (b) (a) Find the speed (in m/s) of the sled and rider at point C. m/s (b) Model the force of water friction as a constant retarding force acting on a particle. Find the magnitude (in N) of the friction force the water exerts on the sled. N (c) Find the magnitude (in N) of the force the chute exerts on the sled at point B.

A uniform cable hanging over the edge of a tall building is 80 ft long and weighs 45 lb. How much work is required to pull 20 ft of the cable to the top of the building?

a bucket of water with a mass of 25 kilograms is lifted from a well by a rope which is wound around a cylinder with a radius of 0.10 meters. A 0.50 meter crank is attached to the cylinder so that it wraps the rope around the cylinder. what is the minimum force that must be applied to the crank to lift the water bucket ?

A box is being lowered from a height of 10m to the ground. A rope is attached to a cylinder. The cylinder is stationary and can be modeled as a solid disc and is 50kg with a radius of 0.8m. The cylinder is frictionless. The box has a mass of 80kg. If the box starts from rest, what is the speed right before it touches the ground?4

A 17.1 kg box is pushed sideways with a 132.5 N force. The box slides 8.8 m in 8.4 s. What is the power output (in watts) of this push?

A tumbleweed rolls off a 120m high cliff with a speed of 23.6 m/s. What would the final velocity of the tumbleweed before striking the ground be if there were no air resistance?

A bag is dragged up a rough slope at a constant speed by a rope on a winch. The kinetic energy of the bag is 500 J and it gains 1000 J in potential energy as it is dragged up the slope. If the work done by the winch to lift the bag up the slope is 1500 J, how much energy was lost as thermal energy?

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A cord connected at one end to a block which can slide on an inclined plane has its other end wrapped around a cylinder resting in a depression at the top of the plane as shown in ( Figure 1). Determine the speed of the block after it has traveled 1.40 m along the plane, starting from rest. Assume there is no friction. Express your answer using two significant figures. Figure M = 33 kg R=0.20 m 58° 1 of 1 ΜΕ ΑΣΦ = 0.844 2+ Submit Previous Answers Request Answer ? m/s × Incorrect; Try Again; 2 attempts remaining Part B Determine the speed of the block after it has traveled 1.40 along the plane, starting from rest. Assume the coefficient of friction between all surfaces is -00310. Since the block is much lighter than the cylinder, ignore tension in the string when calculating the normal force on the cylinder. Do not ignore tension in the string when calculating the net torque (including friction) on the cylinder Express your answer using two significant figures. v= ΜΕ ΑΣΦ Submit Request…

A speedboat with a mass of 545 kg545 kg (including the driver) is tethered to a fixed buoy by a strong 32.7 m32.7 m cable. The boat's owner loves high speed, but does not really want to go anywhere. So the owner revs up the boat's engine, makes a lot of noise, and runs the boat in circles around the buoy with the cable supplying all the necessary centripetal force. When the tension of the cable is steady at 13700 N,13700 N, with what force is the boat's engine pushing the boat? Different physics textbooks treat drag force somewhat differently and use different formulas. For the present purpose, take the water's drag force on the boat to be (450 kg/m)×?2,(450 kg/m)×v2, where ?v denotes the boat's speed. Ignore any drag force on the cable.