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A downward force of 98 N acts on the free end of the illustrated pulley. mA = 47 kg, What is block A's acceleration? Assume that all straight portions of the rope are oriented vertically. The pulleys and ropes are massless. Take the positive direction of motion to be downward. The minus sign in this instance means the block moves upward, not downward. Using the fact that the tension in the rope must remain constant in all sections of the rope, calculate the total force that the rope exerts on pulley B. Determine the net force acting on block A. Using Newton's 2nd law, formulate the equation of motion for block A and solve for its acceleration.
two particles a and b start from rest at the origin s 0 and move along a straight line such that aa 6t-3fts2 and ab
a refrigerator freezer compartment is maintained at a temperature of -15degf by removing heat at a rate of 4500 btuhr.
Find the enthalpy of the steam discharged into the condenser and the thermal efficiency of the cycle.
The temperature of the water drops to 260 F as a result of heat transfer to the surroundings. Determine the final pressure in the tank?
Assume they test null hypothesis H0: versus H1: Will the engineers decide to use the steel if H0 is rejected? Will the engineers decide to use the steel if H0 is not rejected?
1how do the rockwell and brinell tests actually measure hardness ? give any appropriate sketches and formula. are there
a hydro-electric plant uses an 85 efficient turbine-generator to produce power from a reservoir with a height of 45 m
1. analyze the probable cause of the following problems in motors and suggest remedial measuresa. a
determine the magitudes of the horizontal and vertical reactions of the chair on the man at the instant . At this instant he has a speed of 6 m/s, which is increasing at 0.5 m/s^2.
an undeformed specimen of some alloy has an average grain diameter of 0.04 mm. you are asked to reduce its average
a pistoncylinder .5 kg steel altogether maintaining a constant pressure has .2 kg r134a as saturated vapor at 150 kpa.
A block and tackle system with nine supporting strands is used to lift a metal lathe in a manufacturing plant. The motor being used to wind the cable in the pulley system can provide 100 lb. of force.
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