1. Using the principle of conservation of mechanical energy, determine the speed of the block with a mass of 2.00 kg as the block of mass 6.00 kg hits the ground. The 6.00 kg object is initially positioned at 2.00 m high from the ground. Consider frictionless pulley and neglect air resistance. 2.00 kg 6.00 kg

1. Using the principle of conservation of mechanical energy, determine the speed of the block with a mass of 2.00 kg as the block of mass 6.00 kg hits the ground. The 6.00 kg object is initially positioned at 2.00 m high from the ground. Consider frictionless pulley and neglect air resistance. 2.00 kg 6.00 kg

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter5: Energy

Section: Chapter Questions

Problem 12CQ: In most situations we have encountered in this chapter, frictional forces tend to reduce the kinetic...

See similar textbooks

Similar questions

In most situations we have encountered in this chapter, frictional forces tend to reduce the kinetic energy of an object. However, frictional forces can sometimes increase an objects kinetic energy. Describe a few situations in which friction causes an increase in kinetic energy.
Give an example of something think of as work in everyday circumstances that is not work in the scientific sense. Is energy transferred or changed in form in your example? If so, explain how this without doing work.
Two blocks, A and B (with mass 50.0 kg and 1.00 102 kg, respectively), are connected by a string, as shown in Figure P5.86. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is k = 0.250. Determine the change in the kinetic energy of block A as it moves from to , a distance of 20.0 m up the incline (and block B drops downward a distance of 20.0 m) if the system starts from rest. Figure P5.86
A child of mass m starts from rest and slides without friction from a height h along a curved waterslide (Fig. P5.46). She is launched from a height h/5 into the pool. (a) Is mechanical energy conserved? Why? (b) Give the gravitational potential energy associated with the child and her kinetic energy in terms of mgh at the following positions: the top of the waterslide, the launching point, and the point where she lands in the pool. (c) Determine her initial speed V0 at the launch point in terms of g and h. (d) Determine her maximum airborne height ymax in terms of h, g, and the horizontal speed at that height, v0x. (e) Use the x-component of the answer to part (c) to eliminate from the answer to part (d), giving the height ymax in terms of g, h, and the launch angle . (f) Would your answers be the same if the waterslide were not frictionless? Explain. Figure P5.46
(a) How long will it take an 850-kg car with a useful power output of 40.0 hp (1hp=746W) to reach a speed of 15.0 m/s, neglecting friction? (b) How long will this acceleration take if the car also climbs a 3.00-m-high hill in the process?
(I) How much work must be done to stop a 925-kg cartraveling at 95 km/h ?
A student wearing frictionless in-line skateson a horizontal surface is pushed by a friendwith a constant force of 47 N.How far must the student be pushed, starting from rest, so that her final kinetic energyis 354 J ?Answer in units of m.
Consider a fruit hanging on a twig with potential energy of 150 J. If the fruit suddenly falls to the ground, what is the kinetic energy of the fruit as it lands?a. 150.0 Jb. 0 Jc. 1470 Jd. 159.8 J
A 116.3 kg-tiger runs with an initial velocity of 0 m/s to 47 m/s in a span of 7.5 seconds. What is the power of the tiger?
If two different forces can accelerate the same block from rest to the same final speed, then the power generated by the forces is also the same. Group of answer choices True False
The chin - up is one exercise that can be used tostrengthen the biceps muscle. This muscle can exert a forceof approximately 8.00 x 102 N as it contracts a distance of7.5 cm in a 75 - kg male.3 (a) How much work can the bicepsmuscles (one in each arm) perform in a single contraction?(b) Compare this amount of work with the energy requiredto lift a 75 - kg person 40. cm in performing a chin - up. (c) Doyou think the biceps muscle is the only muscle involved in performinga chin - up?
35 - Which of the following regarding mechanical energy is absolutely correct?A) Always protectedB) The change in the mechanical energy of a system is equal to the work done on that system.C) It is the sum of kinetic and potential energiesD) Preserved in environments where there is no friction forceE) Protect in systems with conservative forces