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Joe pushes down the length of the handle of a 12.6 kg lawn spreader. The handle makes an angle of 47 degrees with the horizontal. Joe wishes to accelerate the spreader from rest to 1.34 m/s in 1.7 s. What force must Joe apply to the handle?
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A squirrel has x- and y-coordinates ( 1.4m , 3.3m ) at time t1=0 and coordinates ( 4.8m , -0.40m ) at time t2 = 2.7s, Find the magnitude of the average velocity
whose first two components are the polar coordinates of the horizontal displacement between the planes, and whose third coordinate is the vertical displacement between the planes. Consider east to be the positive x axis and north to be the positiv..
Suppose a 76 kg person hangs vertically from a nylon rope. What radius must the rope have if its fractional enhancement in length is to be the similar as that of the spider's thread.
250mL of water at 20.0 ?C is placed in the freezer compartment of a refrigerator with a coefficient of performance of 6.00. How much heat energy is exhausted into the room
Initially, a swift-moving hawk is moving due west (in the -x direction) with a speed of 60 m/s; 5.0 s later it is moving due north (in the +y direction) with a speed of 25 m/s.
The core of an optical fiber has an index of refraction of 1.27, What is the critical angle for total internal reflection at the core-cladding interface
You pull downward with a force of 32 N} on a rope that passes over a disk-shaped pulley of mass 1.2 kg and radius 0.07 5m. Find the linear acceleration of the 0.61 kg mass.
A 9 V battery is rated at 80 Ah. It can deliver a current of 80 A for one hour, or a current of 40 A for 2 hours, etc. What is the total energy stored in the battery
Space invaders land on earth. On the invaders' temperature scale, the ice point is at 25°I (I = invader), and the steam point is at 153°I.
A current with sinusoidal time-dependence, whose peak value is 5.55 A and frequency is 775 cycles per second, Calculate the average power dissipated by the loop, if its resistance is 64.3
A playground merry-go-round of radius R = 1.40 m has a moment of inertia I = 255 kg · m2 and is rotating at 9.0 rev/min about a frictionless vertical axle. What is the new angular speed of the merry-go-round
At what angle do the equipotentials intersect the edge of the conduction paper? why? Hint: the electric current flow at any point is in the direction of any directly proportional to the electric field vector.
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