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A 85-kg person sits on a 3.7-kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.4 cm in diameter. Find the pressure exerted on the floor by each leg of the chair, assuming the weight is evenly distributed.
In a football game, a tackle running at a constant speed of 5 m/s tackles a stationary receiver. What is the speed of the system's center of mass before the collision
a block of mass 2.5 kg is placed at a distance d=0.300 m from the spring. from this posistion the block is projected toward the spring with a speed v
When she lets go of the rope her initial velocity is 2.25 m/s at an angle of 35 degrees above the horizontal. If she is in flight for .616 s, explain how high above the water was she when she let go of the rope?
A refrigerator has a 1000 W compressor, but the compressor runs only 20% of the time, If electricity costs $0.10/kWh, what is the monthly (30 day) cost of running the refrigerator
An object of mass 45.0 g is initially placed in boiling water so that it is at 111° C. Then the object is dropped into a calorimeter, Find the specific heat of the object
A 0.300 kg glider is moving to the right on a frictionless, horizontal air track with a speed of 0.750m/s when it makes a head-on collision with a stationary 0.150 kg glider, Find the final kinetic energy of first and second glider
A force of F=9.0i+8.0jN is applied to an object about a fixed axis aligned with the z direction. If the force applied at the point (6.00 m, 9.00 m), illustrate what is the magnitude and direction of the torque?
a jetliner is moving at a speed of 270 km/h. the plan then decelerates at 4.5 m/s2. what is the minimum runway length on which this aircraft can land
how much mass can the larger piston support.
A block weighing 15.0 N rests on the floor. What force does the floor exert on the block
A 3.57 kg block is drawn at constant speed 4.06 m along a horizontal floor by a rope exerting a 7.68 N force at angle of 15 degree above the horizontal. Work out the coefficient of kinetic friction between block and floor.
When the three blocks in the figure below are released from rest, they accelerate with a magnitude of 0.740 m/s2, What is the coefficient of kinetic friction between block 2 and the table
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