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Two kids of masses 45 kg and 30 kg sit on the opposite sides of a seesaw. The 45 kg kid sits in the left at a distance of 54 cm from a frictionless axle. Determine:
a) The force that the axle must exert;
b) Where should the 30 kg kid sit. Neglect the mass of the seesaw.
A stockroom worker pushes a box with a mass 11.2kg on a horizontal surface with a constant speed of 3.50m/s. coefficient of kinetic friction between the box and the surface is 0.20.
An electric dipole consists of charges +2e and -2e separated by 0.78nm. It is in an electric field of strength 3.4 x 106 N/C. Calculate the magnitude of the torque on the dipole
A block is being pulled by a rope with a force of 24 N. The rope has an angle of theta=20 degrees from the horizontal. The block moves a distance of 11 m. Elucidate what is the work done?
A 50 kg child takes a ride on a roller coast . the coaster maintains a constant speed of15 m/s as it moves around a loop of radius 10m. what is the centrupetal acceleration of the child
A horizontal power line of length 52 m carries a current of 1.4 kA, find direction of the magnetic force on the power line
a 1000kg car experiences a total power of 150hp (horsepower) if it starts from rest what is the magnitude of the velocity of the car in miles per hour 10s later
An object weighs 277 N in the air. When tied to a string, connected to a balance, and immersed in water, it weighs 221 N. When it is immersed in oil, it weighs 257 N.
A block of glass with flat sides is surrounded by air. A ray of light traveling in the glass (refractive index na) is incident on the flat interface with air at the top surface of the block of glass, What is the refractive index of the glass
Find the magnitude of the acceration of each block. what is the magnitude of the average force exerted on the ball by the wall.
A stream of water strikes a stationary turbine blade horizontally. The incident stream has a velocity of +16m/s whilst the exit has a velocity of -16m/s. mass of water per second that strikes the blade is 30kg/s.find the magnitude of average force ex..
A loudspeaker of mass 21.0 {rm kg} is suspended a distance of h = 2.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of l = 3.90 {rm m}.
A person with a weight of 280 lb stands on two feet wuth their weight equally distributed between the shoes, What is the pressure on each show independently
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