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A 5.00 m long uniform ladder leans against a smooth wall and its base rests on a rough floor. The ladder has a mass of 18.0 kg and its base is a distance of 2.30 m from the wall. A person of mass 80.0 kg climbs 2.50 m up the ladder. If the ladder is to remain in place, what frictional force must be exerted by the floor on the ladder?
A loudspeaker of mass 21.0 {rm kg} is suspended the distance of h = 2.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.90 {rm m}.
When you lift a bowling ball with a force of 98N , the ball accelerates upward with an acceleration a. Find the weight of the bowling ball
what is the rms speed of the molecules. Graphically find out the distance and direction from Lake B to the base camp.
The air around a spinning 142g baseball (below) of radius 3.55cm experiences a faster speed on the left than the right side, determine the pressure difference between the right and left sides of the ball
Throughout a hard sneeze, your eyes may shut for 0.44s. If you are driving a car at 98 km/h during such a sneeze, how far does the car move during that time.
a football spends a total of 5 seconds in the air.it reaches a peak height of 20 meters. how long does it takes to reach its peak height
A certain light truck can go around a flat curve having a radius of 150 m with a lowest speed of 38.0 m/s. With what maximum speed can it go around a curve having a radius of 87.0 m.
Spiderman, whose mass is 72.0 kg, is dangling on the free end of a 11.4-m-long rope, How much work was done by the gravitational force on Spiderman in this maneuver
An explosion breaks an object into two pieces, one of which has 1.5 times the mass of the other. how much kinetic energy did each piece acquire
A certain fluid has a density of 1080 kg/m3 and is observed to rise to a height of 1.8 cm in a 1.0-mm-diameter tube. Calculate the surface tension of the fluid
Two blocks connected by a string are pulled across a rough horizontal surface by a force applied to one of the blocks, what is the magnitude of the applied force
Adjacent antinodes of a standing waves on the string are 15.2 cm apart. A particle at an antinode oscillates in simple harmonic motion with amplitude 0.850 cm and period 0.0750 s. The string lies along the x axis and is fixed at x = 0.
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