Question: A construction hoist exerts an upward force of 500 N
A construction hoist exerts an upward force of 500 N on an object with a mass of 50 kg. If the hoist started from rest, determine the power it expended to lift the object vertically for 10 s under these conditions.
Answer to relevant QuestionsTwo identical springs (neglect their masses) are used to “play catch” with a small block of mass 100 g (Fig. 5.37). Spring A is attached to the floor and compressed 10.0 cm with the mass on the end of it (loosely). ...A0.455-kg soccer ball is kicked off level ground at an angle of 40o with an initial speed of 30.0 m/s. Neglecting air resistance, (a) At its maximum height off the ground, its kinetic energy will be (1) less than its value ...Two balls of equal mass collide head on in a completely inelastic collision and come to rest. (a) Is the kinetic energy conserved? (b) Is the momentum conserved? Explain. An airboat of the type used in swampy and marshy areas is shown in Fig. 6.29. Explain the principle of its propulsion. Using the concept of conservation of linear momentum, determine what would happen to the boat if a sail ...At a basketball game, a 120-lb cheerleader is tossed vertically upward with a speed of 4.50 m/s by a male s cheerleader. (a) What is the cheerleader’s change in momentum from the time she is released to just before being ...
Post your question