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Q. A worker drops a wrench from the top of a tower 61.0 m tall. With what velocity does the wrench strike the ground? (Assume the positive direction is upward.)
Q. A horizontal force of 197 N pushes a 14 kg block up a frictionless incline that makes an angle of 65° with the horizontal.
(a) What is the normal force that the incline exerts on the block?
(b) What is the acceleration of the block? (Hint: assume up the block as the positive direction.)
A horizontal uniform bar of mass 2.9kg and length 3.0 m is hung horizontally on two vertical strings. String 1 is attached to the end of the bar, and string 2 is attached the distance 0.74 m from the other end.
A basketball player grabbing a rebound jumps 70.80 cm perpendicularly. How much total time (ascent and descent) does the player spend (a) in the top 11.2 cm of this jump and (b) in the bottom 11.20 cm? Do your results describe why such players see..
What is the final temperature when .032kg of milk at 11C is added to .16 kg of coffee at 91C. suppose the specific heat capactieis of the two liquids are the same as water, and disregard any energy transfer to the liquid's surroundings.
Calculate the net work done on Gas
A thin, light wire is wrapped around the rim of a wheel. The wheel rotates without friction about a stationary horizontal axis that passes through the center of the wheel. The wheel is a uniform disk with radius 0.28. An object of mass 4.0 is suspend..
A screen is placed 51.0 cm from a single slit that is illuminated with light of wavelength 677 nm. If the distance between the first and third minima in the diffraction pattern is 2.80 mm, what is the width of slit.
In adding, the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find out the acceleration of the sled and child.
A cockroach of mass m lies on the rim of a uniform disk of mass 7.00 m that can rotate freely about its center like the merry-go-round. At first the cockroach and disk rotate together with an angular velocity of 0.220 rad/s. Then the cockroach walks ..
What is the maximum speed of the mass. What is the radial acceletation experience by mass while it remains at its max. angular speed.
A production line inspector wants a mirror that produces an upright image within magnification of 7.4 when it is located 15 mm from a machine part.
A spherical shell has an outside radius of 2.6cm and an inside radius of a. The shell wall has uniform thickness and is made of a material with density 4.70g/ cm3. The space inside the shell is filled with a liquid having a density of 1.23g/cm3.
An electron is released from rest in a uniform electric field and accelerates to the north at a rate of 199m/s2. What is the magnitude of the electric field?
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