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A steel cable is to support an elevator whose total (loaded)mass is not to exceed 2900 kg. If themaximum acceleration of the elevator is 1.1 m/s2, calculate the minimum diameter of cable required. Assume a safety factor of 7.0.
cm
A projectile is fired in such a way that its horizontal range is equal to12.5times its maximum height. What is the angle of projection
Two plates of area 30.0 cm2 are separated by a distance of 0.0150 cm. calculate the potential difference (voltage) between the two plates
The driver of an 1800 kg car travelling at 23 m/s slams on the brakes, locking the wheels on the dry pavement. The coefficient of kinetic friction between rubber and dry concrete is typically 0.700.
The moon is observed using a telescope that has an objective lens with a focal length of 3.0 m and an eyepiece with a focal length of 7.5 cm. What is the angular diameter of the moon
A 10.0-ohms resistor, a 10.0-mh inductor, and a 100 uF capacitor are connected in series to 50.0-V (rms) having variable frequency. find the energy delivered to the circuit during one period
A bullet with mass 5.04 g is fired horizontally into a 2.125-kg block attached to a horizontal spring. Find the initial speed of the bullet-block system
A hollow ball with mass 0.50kg and radius 10cm rolls down a 3.0m high ramp without sliding.What is the maximum hight that the ball reaches?
A rocket passes Earth and travels to a star, 80 light-years away. The earth hand the star are in the same frame of reference and the rocket moves at 0.9c with respect to the earth and the star. How many years does it take the rocket to reach this s..
A factory worker pushes horizontally to the right on a 250 N crate with a force of P = 75.0 N on a horizontal rough floor. A 135 N crate rests on top of the one being pushed and moves along with it. Call the bottom crate {rm A} and the top crate {..
A 6.0-kg block is at rest on a horizontal floor. If you push horizontally on the 6.0-kg block with a force of 24.0 N, it just starts to move. What is the coefficient of static friction
Consider a harmonic, electromagnetic plane wave traveling along a line from the origin to the point (3,5,6). It is linearly polarized , Compute the irradiance of the wave
A magnifying glass is a single convex lens with a focal length of f = +13.0 cm.
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