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A uniform 240 N ladder rests against a perfectly smooth wall, making a 40.0 angle with the wall.
A. Find the normal forces that the wall on the ladder.
B. Find the normal force that the floor exert on the ladder.
C. What is the friction force on the ladder at the floor?
The diagram of a speaker has a mass of 50.0g and responds to a signal of 2.0 khz by moving back and forth a with an amplitude of 1.8 X10^-4 m at that frequency. what is the force acting on the speaker
Derive the magnitude of the angular momentum vector of the electron in the ground state in tritium.
The minimum distance required to stop a car moving at 34 mi/h is 42 ft. What is the minimum stopping distance for the same car moving at 64.0 mi/h, assuming the same rate of acceleration.
Two objects are connected by a light string that passes over a frictionless pulley, Find the magnitude of the accelerations of the objects
Dorothy is up on her 16.0m by 15.0m roof enjoying the view of Kansas. Suddenly, a strong wind blows down her ladder, leaving her stranded. Calculate the force on the roof
What is the energy density in the electric field at the surface of a 2.90-cm-diameter sphere charged to a potential of 1000V
q1. the sound level measured in a room by a person watching a movie in a home theatre system varies from 66 db during a
A 8kg block is attached to a light rope that passes over a uniform disk-shaped 4kg pully of radius 0.6m without slipping. On the other side of the puly the rope is attached to a light unstreched spring with a stiffness
Calculate the horizontal force that must be applied to a 1.00 kg puck to make it accelerate on a horizontal friction-free air table with same acceleration it would have if it were dropped and fell freely.
A generator rotates at 95Hz in a magnetic field of 0.025T . It has 650 turns and produces an rms voltage of 180V, What is the peak current produced
You can excite waves in a string of length 1.142 m fixed at both ends. You started from an arbitrarily low frequency and increased it slowly. What is the speed of the wave in the medium in m/s
A prospector finds a solid rock composed of granite (? = 2650 kg/m3) and gold. The volume of the rock is 2.85 multiplied by 10-4 m3, What mass of gold is contained in the rock
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