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A 730- boulder is raised from a quarry 149 deep by a long uniform chain having a mass of 600 . This chain is of uniform strength, but at any point it can support a maximum tension no greater than 2.70 times its weight without breaking.
A) What is the maximum acceleration the boulder can have and still get out of the quarry?
B) How long does it take to be lifted out at maximum acceleration if it started from rest?
Superman meets an asteroid in outer space and hurls it at 90m/s. The asteroid is five hundred times more massive than Superman is. In the strip, Superman is seen at rest after throw. Taking physics into account, what would be his recoil speed.
A rescue helicopter lifts a 60 kg person straight up by means of a cable. The person has an upward acceleration of 0.70 m/s2, How much work is done by the tension in the cable
With what minimum speed must you toss a 100 g ball II str aig ht up to just barely hit the I O-m-high ceiling of the gymnasium, With what speed does the ball hit the floor
What relationship did Galileo discover about a ball%u2019s acceleration, What acceleration occurs when the plane is vertical
If a disco disk is rotating with a person on it on the outer side, then if he moves inside (towards the center), the angular velocity will change-How will the energy be conserved.
An object is located on the inner side of a spinning cylinder with an angular velocity of 20rad/s. what is the radius of the cylinder
A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. With two 5.00 g coins stacked over the 15.0 cm mark, the stick is found to balance at the 42.0cm mark. What is the mass of the meter stick
The plates of a 631-pF parallel plate capacitor are separated by 1.21 mm, what is the magnitude of the electric field in the capacitor
Four identical charges (+2.2 ?C each) are brought from infinity and fixed to a straight line. Determine the electric potential energy of this group
A point charge is moved in an electric field. The potential changes from -87 V to +30 V between the initial and final position. The work done by the electric field is 156 J
A 73kg hiker climbs to the top of a 4000m -high mountain. The climb is made in 5.5h starting at an elevation of 2900m. Calculate the work done by the hiker against gravity
A pedestrain bridge consists of a walkway of mass 1000kg and length 10.0m supported at each end by brackets. Two people, each of mass 80kg, are walking across the bridge.
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