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A 30-kg cover for a roof opening is hinged at corners A and B. The roof forms s an angle of 30o with the horizontal, and the cover is maintained in a horizontal position by the brace CE. Determine
(a) The magnitude of the force exerted by the brace,
(b) The reactions at the hinges. Assume that the hinge at A does not exert any axial thrust.
A .075 Kg toy rocket is launched straight up from the ground at 19 m/s. Calculate the power of gravity force during the first 10s
A 110-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 370N. What is the final speed of the crate
A 6.0kg crate is pushed from the top of an incline and travels down the incline with an initial speed of 8m/s.find loss of potential energy
A 25 g bullet fired horizontally hits a 1.35 kg block of wood placed on a horizontal surface.The bullet penetrates into the block and stays in the wood. what was the speed of the bullet
A 74 kg man in a 6.0 kg chair tilts back so that all the weight isbalanced on two legs of the chair. find the pressure exerted by each leg on the floor
One of James Bond's adversaries is standing on a frozen lake;there is no friction between his feet and the icewhat is themagnitude of his horizontal recoil velocity
assume that the area of contact between an automobile tire and the road is a rectangle with dimensions 17.5 cm cross
A 47-kg bungee jumper has fallen far enough that her bungee cord is beginning to stretch and resist her downward motion. Find the force (magnitude and direction) exerted on her by the bungee cord
An estimated 3kg-Gromit was tied to a bungee cord to clean the windows of Wendolene Ramsbottom's wool shop. If gromit stops before he reaches the ground, what is the height h of his waist above the ground at his lowest point
Announcers at a certain radio station say that they are at "95 FM on your dial," meaning that they transmit at a frequency of 95 MHz, find the wavelength of the radio waves from this station
What is the electric field strength at a point in space where a proton experiences an acceleration of 1.5 million "g's"?
A 7.70 centimeter length of straight wire runs horizontally along a north-south line. Obtain the direction of the magnetic force on wire
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