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At t=1.0 second, a 0.46 kilogram object is falling with a speed of 5.5 m/s. At t=2.0 second, it has a kinetic energy of 28 Joule. Find what is the kinetic energy of the object at t=1.0 second? Find what is the speed of the object at t=2.0 s? Find how much work was done on the object between t=1.0 s and t=2.0 s?
A 92.0-kg astronaut and a 1200-kg satellite are separated from the space ship, and are both at rest with respect to the ship without any method of getting to the ship. how far away from the ship is the satellite
A person with a mass 66.0 kg is riding in a Ferris Wheel with a radius of 70.0 meters and a period of 80.0 minutes. What normal force does the person experience
The potential is constant throughout a given region of space. Is the electric field zero or nonzero in this region
Water flowing in a horizontal pipe is at a pressure of 1.55 105 Pa at a point where its cross-sectional area is 6.00 m2. Find the water's speed in the wider pipe
Billy Dee notes that her favorite record rotates at 34 rev/min. At what speed does the point on the record touching the stylus (needle) move when the stylus (needle) is 5.9 cm from the center?
You are playing tetherball with a friend and hit the ball so that it begins to travel in a circular horizontal path. find the tension force that the rope exerts on the ball just after you hit it
The objective lens of the refracting telescope at the Lick Observatory in California has a focal length of 57 ft. What is the refractive power of this lens
A box of sand, initially at rest, is to be pulled across a floor by means of a cable in which the tension cannot be allowed to exceed 1100N. What is the weight of the sand and box in that situation
A piston, A, as shown below, has a diameter of 0.81 cm. A second piston, B has a diameter of 3.9 cm. conclude the force, F, necessary to support the 508.0 N weights in the absence of friction.
Rodney weighs 160 lb. He sits in a comfortable chair in which 90% of his weight is supported by his rear end and upper thighs and 10% by his feet, what is the average pressure over this area
A uniform narrow tube 1.70 long is open at both ends. It resonates at two successive harmonics of frequencies 245 and 294. What is the speed of sound in the gas in the tube
if f 29 n the angle is 63.5 degrees m 2.6 kg the coefficient of kinetic friction is 0.25 and the vertical contact
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