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BAED-PHYC2121 General Physics 1
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6.3 Potential Energy
A 5.00 kg ball falls from a 2.00 m-high shelf. Just before hitting the floor, what will be its kinetic energy? (g = 9.80 m/s2 and assume air resistance is negligible)0%
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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?
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A worker pushes a sled with a force of 46 N over a level distance of 5.0 m. If a frictional force of 9 N acts on the wheelbarrow in a direction opposite to that of the worker, what net work is done on the wheelbarrow?
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6.7 Power
A jet engine develops 2.0 × 105 N of thrust in moving an airplane forward at a speed of 900 km/h. What is the power developed by the engine?0%
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Two objects, one less massive than the other, collide elastically and bounce back after the collision. If the two originally had velocities that were equal in size but opposite in direction, then which one will be moving faster after the collision?
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6.7 Power
A 66-kg woman runs up a flight of stairs having a rise of 4.0 m in a time of 4.2 s. What average power did she supply?0%
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A billiard ball (Ball #1) moving at 6.00 m/s strikes a stationary ball (Ball #2) of the same mass. After the collision, Ball #1 moves at a speed of 5.25 m/s. Find the speed of Ball #2 after the collision.
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The unit of power, watt, is dimensionally the same as:
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3.4 Free Fall
A cart of weight 60 N is accelerated across a level surface at 0.15 m/s2. What net force acts on the cart? (g = 9.8 m/s2)0%
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1.3 Dealing with Numbers
The number 0.0001070 has how many significant figures?0%
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