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an airplane has a takeoff speed of 80 ms which it reaches 35s after starting from rest what is the minimum length of
calculate the speed of a proton that is accelerated from rest through a potential difference of 120 vcalculate the
a person uses a converging lens of focal length 50 cm as amagnifying glasspart awhat is the maximum possible
a crate is sliding down a ramp that is inclined at an angle of380o above the horizontal the coefficient of
the speed of a bobsled is increasing because it has anacceleration of 24 ms2 at a given instant in timethe forces
a magnifying lens has a focal length of 10 cm a person has a nearpoint of 25 cmpart awhat is the magnification of the
how far from a 50-mm focal length lens such as is used in many35-mm cameras must an object be positioned if it is to
a sun yacht is a spacecraft with a large sail that is pushedby sunlight although such a push is tiny in
a novice skier startingfrom rest slides down a frictionless 35 o incline whosevertical height is 125 m how fast is she
when mass m is at the position shown it is sliding down theinclined part of a slide at a speed of 189 ms the mass stops
calculate the kinetic energy that the earth has because ofa its rotation about its own axis andb its motion around the
a 175 kg block slides on a rough horizontal surface the blockhits a spring with a speed of 186 ms and compresses it a
the drawing shows a circuit that contains a battery two resistors and a switch what is the equivalent resistance of the
an elevator cab and its load have a combined mass of 1600kg find the tension in the supporting cable when the cab
two boxes sit side by side on a smooth horizontalsurface the lighter box has a mass of 52 kg the heavier box hasa mass
a 40 kg girl and an 84 kg sled are on the fictionless ice ofa frozen lake 15m apart but connected by a rope of
a 85 watt light bulb uses anaverage power of 85 w when connectedto an rms voltage of 120 va what is the resistance of
consider a bead of mass m that is free to move on a thincircular wire of radius r the bead is given an initial speedvo
coasting along at 747 ms a 730 kg bicyclist on a 706 kgbicycle encounters a small hill if the speed of the bicyclist
the motor of a ski boat produces a power of 38000 w to maintain aconstant speed of 153 ms to pull a water skier at the
a rectangular loop of wire is sitting next to a straight wireas shown in the figure below there is a current of i 213
a spinning ice skater speeds up by pulling her hands to theside of her body approximate the ice skater by a cylinder
a very long 200 cm diameter lead rod absorbs 410 kj of heat by how much does its length change what would happen if
monochromatic light falls on a slit that is 26010-3 mm wide if the angle between the first darkfringes on either side
a baseball leaves the bat at a height of 4 feet above theground traveling at an angle of 45 degrees with the