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Review Conceptual Example 7 before starting this problem. Auniform plank of length 5.0 m and weight 225 N rests horizontallyon two supports, with 1.1 m of the plank hanging over the rightsupport (see the drawing). To what distance x can a personwho weighs 484 N walk on the overhanging part of the plank beforeit just begins to tip?
A meterstick moving at 0.892c relative to the Earth's surface approaches an observer at rest with respect to the Earth's surface. What is the meterstick's length as measured by the observer
A 35.2 kg box is sitting on the seat of a ferris wheel. Find the normal force the seat of the ferris wheel exerts on the box at the bottom of the loop and at the top of the loop
A bottle has a mass of 25.90g when empty and 90.34g when filled with water. When filled with another fluid, the mass is 88.74g . What is the specific gravity of this other fluid?
a light ray of wavelength 550 nm initially in water enters a transparent substance at an angle of 37 degrees with
A steel cable is stretched across a gorge. The cable is 190 m long and has a mass of 44 kg. When one end of the cable is struck with a hammer, a wave pulse travels down the cable, reflects at the far end, and is detected back at the first end 14 s la..
A 1000 kg car is traveling at a speed of 20 m.s-1 east and a 1200 kg car is traveling at 22 m.s-1 west. What is the velocity of the second car measured from the center of mass reference frame of the system?
What net torque must be applied to the wheel. How several meters would the molecule.
A 6.40 nF capacitor is initially charged by a potential difference of 1.40×103 V. find the final electric potential energy stored in the capacitor
suppose that the position vector fot a particle is given as a function of time by r(t) =x(t)i + y(t)j, with x(t) = at+b and y(t) = ct^2 + d, where a= 1.50m/s, b =1.25m, c= 0.123m/s^2, and d =1.02m
A roller-coaster car moves 207 ft horizontally and then rises 119 ft at an angle of 30° above the horizontal. What is its displacement from its starting point
Illustrate what is the magnitude of the change in momentum of the ball while in contact with the bat if the ball leaves with a velocity of (a) 18 m/s, vertically downward, and (b) 18 m/s, horizontally back toward the pitcher?
question1a war-wolf or trebuchet was a device used throughout the middle ages to throw rocks at castles and now
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