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A ladder of weight 500 N and length 10.0 m is placed against a smooth vertical wall. A person weighing 750 N stands on the ladder 3.0 m from the bottom as measured along the ladder. The foot of the ladder is 8.0 m from the bottom of the wall. A) Calculate the force exerted by the wall B) the normal force exerted by the floor on the ladder
The figure shows a 100-kg block being released from rest from a height of 1.0 m. It then takes 0.53 s for it to reach the floor. What is the mass m of the block on the left? There is no friction or mass in the pulley, and the connecting rope is ve..
A particle is in uniform circular motion about the origin of an xy coordinate system, moving clockwise with a period of 7.70 s. what is its velocity in unit-vector notation
a convex lens with a 5 cm radius is used to focus sunlight on a piece of paper to a spot 1 mm in diameter. if it takes
Calculate the energies and wavelengths of the 3d to 2p transitions, taking into account the fine structure of both levels
A skydiver reaches a "terminal velocity" of 120 km/h. If the skydiver has a mass of 59kg, what is the magnitude of the upward force on the skydiver
A block with mass m = 21.5 kg slides down an inclined plane of slope angle 12.1o with a constant velocity. How far up the incline will the block move before coming to rest
A pendulum is made of a rod of mass 1.7 kilogram and length 3.8 meter whose moment of inertia about its center of mass is (1/12) ML2. Find the moment of intertie of the pendulum about the pivot point
A series RLC circuit has R= 50, L= 2.7 H, and C= 52 nF. It is connected to an AC voltage source with an rms amplitude of 12 V, find the average power dissipated by the circuit
What is true of the net force when 3 or more forces are in a state of equilibrium, and If a force (F) make an angle (theta) with the x-axis, what are the formulas used to the x and y components of this force
Determine the magnitude of the electric field 3.0 cm from the point charge.
A sample of a particular isotope registers 160 counts per minute. Eight hours later, the detector registers a rate of 10 counts per minute. What is the half-life of the material
a 0.060 kg tennis ball moving with a speed of 7.60 ms has a head-on collision with a 0.080 kg ball initially moving in
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