ACCOUNTING 101-Physics Questions and Answers

ACCOUNTING 101-Physics Questions and Answers A 12.00-kg bowling ball falls from a 2.00-m shelf. Just before hitting the floor, what will be its kinetic energy? (g = 9.80 m/s2 and assume air resistance is negligible) 235 J A 55-N crate is pulled up a 4-m inclined plane by a worker at constant velocity. If the plane is inclined at an angle of 37° to the horizontal and there exists a constant frictional force of 25 N between the crate and the surface, what is the force applied by the worker? 58 N A careful photographic survey of Jupiter's moon Io by the spacecraf Voyager 1 showed active volcanoes spewing liquid sulfur to heights of 60 km above the surface of this moon. If the value of g on Io is 2.0 m/s2 , estimate the speed with which the liquid sulfur lef the volcano. 490 m/s What is the minimum amount of energy required for an 60-kg climber carrying a 5-kg pack to climb Mt. Everest, 8,150 m high? 5.19 MJ When an object is dropped from a tower, what is the effect of the air resistance as it falls? None of the above choices are valid. The SI units for k, the spring constant, are equivalent to: . kg / s2 . A 60-kg woman runs up a flight of stairs having a rise of 4.1 m in a time of 4.2 s. What average power did she supply? 574 W An Earth satellite is orbiting at a distance from the Earth's surface equal to two Earth radii. At this location, the acceleration due to gravity is what factor times the value of g at the Earth's surface? 1/9 At an altitude of 3 times the radius of the Earth, the acceleration due to gravity is Not given A 0.40-kg mass, attached to the end of a 0.75-m string, is whirled around in a circular horizontal path. If the maximum tension that the string can withstand is 400 N, then what maximum speed can the mass have if the string is not to break? 27 m/s A 15.0-kg box starts at rest and slides 4.5 m down a ramp inclined at an angle of 10° with the horizontal. If there is no friction between the ramp surface and crate, what is the velocity of the crate at the bottom of the ramp? (g = 9.8 m/s2 ) 3.91 m/s A golf ball hits a wall and bounces back at 2/5 the original speed. What part of the original kinetic energy of the ball did it lose in the collision? 21/25 Geosynchronous satellites orbit the Earth at a distance of 42,000 km from the Earth's center. Their angular speed at this height is the same as the rotation rate of the Earth, so they appear stationary at certain locations in the sky. What is the force acting on a 2000-kg satellite at this height? The radius of the Earth is . (Hint: Use that gravity behaves as .) 455N Which of the following is that form of energy associated with an object's location in a conservative force field? Potential A 100-W light bulb is lef on for 20.0 hours. Over this period of time, how much energy did the bulb use? 7.2 MJ If the momentum of an object is tripled, its kinetic energy will change by what factor? Nine Alex throws a 0.10-kg rubber ball down onto the floor. The ball's speed just before impact is 5.5 m/s, and just afer is 2.5 m/s. What is the change in the magnitude of the ball's momentum? 0.8 kg⋅m/s A baseball outfielder throws a baseball of mass 0.15 kg at a speed of 30 m/s and initial angle of 30°. What is the kinetic energy of the baseball at the highest point of the trajectory? Ignore air friction. 51J A billiard ball (Ball #1) moving at 6.00 m/s strikes a stationary ball (Ball #2) of the same mass. Afer the collision, Ball #1 moves at a spee