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A bouncy ball of mass 81 g is thrown straight into a wall at the speed of 23 m/s. The collision is completely elastic, and the ball is bounced back at the same speed as it is thrown. What is the impulse applied to the ball by the collision?
A rural power line carries 1.7 A rms at 4700 V. A step down transformer reduces this to 235 V rms to supply a house. Find the turns ratio of the transformer
A 0.621-kg basketball is dropped out of a window that is 5.26 m above the ground. How much work is done on the ball by its weight
a 18 cm tall object is placed in front of a concave mirror with a radius of 26 cm. the distance of the object to the mirror is 74 cm. Calculate the magnitude of the image height
A block with a mass m= 5.7 kg is pulled up a 29 degree incline with the force of magnitude F = 38N. Find the acceleration of the block if the incline is frictionless
Explain how fast will he be moving backward just after releasing the ball?
A sign weighing 400N is suspended at the end of a 350N uniform rod that is hinged at the wall. What is the tention T in support cable
A 2.0-kg solid cylinder of radius 0.5 m rotates at a rate of 40 rad/s about its cylindrical axis. What power is required to bring the cylinder to rest in 10 s
Biological muscle cells can be thought of as nanomotors that use the chemical energy of ATP to produce mechanical work. How much work is done by such proteins
A 2.2hp electric motor on a water well pumps water from 14m below the surface. How many liters of water does the motor pump in 2.0hr
Starting from rest, a 4.4-kg block slides 2.70 m down a rough 30.0° incline. The coefficient of kinetic friction between the block, Determine the work done by the force of gravity
A concave mirrior is to form an image of the filament of a headlight lamp on a screen 8.00 m from the mirrior. The filament is 6.00 mm tall, Is the image upright or inverted
Find the current in a 9.00 ? resistor connected to a battery that has an internal resistance of 0.30, What is the emf of the battery
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