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In the figure, a block of mass m = 12 kg is released from rest on a frictionless incline of angle ? = 26°. Below the block is a spring that can be compressed 2.8 cm by a force of 330 N. The block momentarily stops when it compresses the spring by 6.9 cm. (a) How far does the block move down the incline from its rest position to this stopping point? (b) What is the speed of the block just as it touches the spring?
A boy coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 6.9 m/s. how far does the sled travel on the level surface before coming to rest
One end of a wire is attached to a ceiling, and a solid brass ball is tied to the lower end. The tension in the wire is 145 N. What is the radius of the brass ball
An artillery gun is firing a shell with the initial velocity V0 =250 m/s at an angle 1 =60o to the horizontal. Find the time interval t between shots
A mass on a spring vibrates in simple harmonic motion at a frequency of 0.75 Hz and amplitude of 4.0 cm. what is the speed of the mass when t = 1.0 s
A ballplayer standing at homeplate hits a baseball that is caught by another player at the same height above the ground from which it was hit. How high will the ball rise
During an eclipse, the Sun, Earth, and Moon are arranged in roughly a straight line. Calculate the percentage change in your weight when going from one type of eclipse to the other
A large wooden turntable in the shape of a flat disk has a radius of 2.05m and a total mass of 130kg. Find the angular speed of the turntable after the parachutist lands
A lens with an index of refraction of 1.60 is to be coated with a material (n = 1.39) that will make the lens nonreflecting for yellow-orange light (? = 515 nm) normally incident on the lens
A mass M of 1.19 kg is attached to the end of a string whose length is 0.650 m. The mass slides without friction on a horizontal surface as indicated. If the string can withstand a maximum tension of 55.5 N, what is the maximum tangential speed th..
Two 18 cm diameter charged disks face each other, 25 cm apart. Both disks are charged to - 30 nC. What is the electric field strength at the midpoint between two disks.
The two hot-air balloons in the drawing are 48.2m and 61.0 m above the ground, What is the horizontal distance x between the two balloons
Find out vertical and horizontal components of the pendulum
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