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A 55 kilogram person holds a weight of 20 kilogram on his head. Obtain what is the work done by him against gravity if he moves a distance of 20 meter
(1) on a horizontal road,
(2) on an incline of 1 in 5?
When a spacecraft travels from the Earth to the Moon, both the Earth and the Moon exert a gravitational force on the spacecraft. How far from the Earth's surface must the spacecraft be
While looking at her image in a cosmetic mirror, Dina notes that her face is highly magnified when she is close to the mirror, but as she backs away from the mirror, What type of mirror does Dina have
A 10 kg box slides 4.0 m down a frictionless ramp and collideswith a spring as shown in the figure. The spring constant is 250N/m. At what compression of the spring does the box have its maximum speed?
A 0.280 kilgram puck, initially at rest on a friction less horizontal surface, is struck by a 0.205 kilogram puck that is initially moving along the x axis with a velocity of 2.00 m/s. Calculate the percentage of kinetic energy lost in collision
An ideal gas at 14.5 °C and a pressure of 1.10 x 105Pa occupies a volume of 4.17 m3. How many moles of gas are present
A stone was thrown upward with an initial speed of 10m/s from theroof of a building and strikes the ground in 6s (no air resistance) How tall is the building? How high does the ball go in respect to the roof?
A car battery with a 12 V emf and an internal resistance of 0.035 is being charged with a current of 60 A. What is the rate Pr of energy dissipation inside the battery
40 kg ball is thrown with a speed of 12 m s at an angle of 33 degrees. what is the speed at its highest point and how high does it go? use conservation of energy and ignore air resistance
A ball is released from rest at t=0.3s on an inclined segement of track. The ball rolls down the incline onto a 2m section of level track and then continues down a second incline, find the speed of the ball on the level segment of track
An RL circuit has a V=9V battery, a R=13000Ohm resistor, and a L=0.7H, connected in series with a switch. What percentage of the maximum current flows through the circuit at time t = 0.10769milliseconds
A weather vane initially at rest has a moment of inertia of 0.110 kg · m2 about its axis of rotation. Find the angular velocity of the weather vane just after it is struck
upstream of a normal shock in air the pressure is 14.7 psia and the temperature is 528r. downstream of the shock the
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