Chapter 13, Problem 83P

What’s the answer for this please?

A box with a mass of 3000 g slides down the slope. The slope is inclined at an angle of 30 degrees and has a length of 1 meter. The box starts from rest at the top, experiences a constant force of friction with a magnitude 5.00 N, and begins to travel a short distance to the horizontal floor after leaving the slope. Calculate the box's speed at the bottom of the

On its takeoff roll, the airplane starts from rest and accelerates according to a = ao - kv² where ao is the constant acceleration resulting from the engine thrust and -kv² is the acceleration due to aerodynamic drag. If að = 1.6 m/s², k = 0.000039 m ¹, and vis in meters per second, determine the design length of runway required for the airplane to reach the takeoff speed of 271 km/h if the drag term is (a) excluded and (b) included. V0 = 0 Answers: (a) Excluding drag, s= i (a) Including drag, S= i v=271 km/h m 3

Mary and her sister are playing with a cardboard box on the neighborhood hill. Mary climbs into the box, the total mass of the box with Mary in it is 115 kg. The box starts at rest at the beginning of the incline. The hill is at an incline of 28 degrees with respect to the horizontal.The static and kinectic friction between the box and hill is 0.4 and 0.2 respectively. Assume that Mary is now in the box, but has not started to move. a. What is the gravitational force acting on the box and child system?b. What is the magnitude of the normal force acting on the box?c. What is the reaction force associated with the normal force found in the previous step.

A vertical take-off and landing aircraft has a mass of 9000 kg. A constant upward thrust of 100 kN is applied to it. Determine the vertical distance it will travel when it reaches the velocity of 10 m/s. Clearly write down here what principle or law you use in this problem. Draw FBD of the aircraft here.

The ship was traveling at 2.5 m/s toward the reef when a mechanical failurecaused the rudder to jam in the straight-ahead position. At that point in time, the shipwas 900 m from the reef. The wind was blowing directly toward the reef and exertinga constant force of 9.00 x 103 N on the boat in a direction toward the reef. The massof the ship and its cargo was 5.50 x 10 kg. During the preparation for the trial, thecaptain claims that without control of the direction of travel, the only choice he hadwas to put the engines in reverse at maximum power, such that the total force exertedby the frictional drag force of the water on the propeller was 1.25 x 10-N in a directionaway from the reef. From this information, construct a convincing argument thatnothing the captain could do in this situation could have prevented the sh fromstriking the reef.

Dynamics of Rigid Bodies. Please answer in clear and complete solution

A 7.8-Mg truck is resting on the deck of a barge which displaces 374 Mg and is at rest in still water. If the truck starts and drives toward the bow at a speed relative to the barge vrel = 5.6 km/h, calculate the speed v of the barge. The resistance to the motion of the barge through the water is negligible at low speeds. Vrel = 5.6 km/h 7.8 Mg %3D 374 Mg Answer: v = km/h

A light plane of mass 1200 kg makes an emergency landing on a short runway. With itsengine off, it lands on the runway at a speed of 35 m/s. A hook on the plane snags acable attached to a 130 kg sandbag and drags the sandbag along. Now you can consider thesystem as a combined mass along with the sandbag and the plane.Now, the coefficient of friction between the sandbag and the runway is μk = 0.4, and also theplane’s brakes give an additional retarding force of magnitude 1400 N. So our target for thisproblem is to find how far does the plane go before it comes to stop.Assume, when the plane snags the sandbag, the collision is instantaneous.[Hints Think carefully whether you can apply conservation of momentum or not] Find the speed of the plane and sandbag immediately after the collision.