Blocks i and ii, each with a mass of 1.0 kg, are hung from the ceiling of an elevator by ropes 1 and 2.what is the force exerted by rope 1 on block i when the elevator is traveling upward at a constant speed of 2.0 m/s? what is the force exerted by rope 1 on block ii when the elevator is stationary?
when a body in the elevator is hung then-
if the elevator is at rest the only its weight is acting on it,
a. if the elevator is moving upward with constant velocity the wight of the body will not change.
b. if the elevator is moving upward with constant acceleration the weight of the body will increase.
c. if the elevator is moving downward with constant velocity the weight of the body will remain the same.
d. if the elevator is moving downward with constant acceleration the weight of the body will decrease.
Answers: 2
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A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?
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Ablock of mass 1.5 kg slides down an inclined plane that has an angle of 15. if the inclined plane has no friction and the block starts at a height of 3 m, how much kinetic energy does the block have when it reaches the bottom? acceleration due to gravity is g = 9.8 m/s2. a. 6.8 j b. 50.9 j c. 0 j d. 44.1 j
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Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.
Answers: 3
Blocks i and ii, each with a mass of 1.0 kg, are hung from the ceiling of an elevator by ropes 1 and...
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