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A 9.14-m ladder with a mass of 24.2 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 254 N. At the instant the top of the ladder leaves the ground, the ladder experiences an angular acceleration of 1.92 rad/s2 about an axis passing through the bottom end of the ladder. The ladder's center of gravity lies halfway between the top and bottom ends.
(a) What is the net torque acting on the ladder?
(b) What is the ladder's moment of inertia?
An 24 g rifle bullet traveling 370 m/s buries itself in a 4.8 kg pendulum hanging on a 2.6 m long string, which makes the pendulum swing upward in an arc. find the maximum vertical displacement of the pendulum.
A beam contains 4.0 108 doubly charged positive ions per cubic centimeter, all of which are moving north with a speed of 1.3 105 m/s
What is the Acceleration of an object moving on a circular track
The Space Shuttle travels at a speed of about 7.60 103 m/s. How many football fields (length = 91.4 m) does the Shuttle cover in the blink of an eye
In heavy rush-hour traffic you drive in a straight line at 12 m/s for 1.5 minutes, then you have to stop for 3.5 minutes, and finally you drive at 15 m/s for another 2.5 minutes. compute the average velocity between t=0 and t=7.5 minutes.
An ambulance driver traveling at 33.0 m/s honks his horn as he sees a motorist ahead on the highway, Calculate the proper frequency of the ambulance's horn
A 22 child slides down a 2.4 -high playground slide. She starts from rest, and her speed at the bottom is 1.9 What is the change in thermal energy of the seat of her pants
An airplane flies eastward and accelerates uniformly. At one position along its path it has a velocity of 33.5 m/s. It then flies a further distance of 46.9 km and its velocity is 43.1 m/s. Find the airplane's acceleration and calculate how much t..
A rifle is aimed horizontally at a target 47.0 away. The bullet hits the target 1.80 below the aim point. Evaluate the bullet's flight time? What was the bullet's speed as it left the barrel?
An 88 kg spacewalking astronaut pushes off a 640kg satellite, exerting a 640N force for the 0.60 s it takes him to straighten his arms.
A 2590-kg spacecraft is in a circular orbit 2720 km above the surface of Mars. How much work must the spacecraft engines perform to move the spacecraft to a circular orbit that is 4480 km above the surface
The forward airspeed of an airplane is 75.0 m/s, and an airplane propeller turns at 2400 rpm. What is the maximum possible propeller radius
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