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9.75-m ladder with a mass of 23.2 kg lies flat on the ground. Apainter grabs the top end of the ladder and pulls straight upwardwith a force of 245 N. At the instant the top of the ladder leavesthe ground, the ladder experiences an angular acceleration of 1.80rad/s2 about an axis passing through the bottom end ofthe ladder. The ladder's center of gravity lies halfway between thetop and bottom ends. (a) What is the net torque acting on the ladder?
(b) What is the ladder's moment of inertia?
An initially motionless car of mass 1000kg slides down from a height on a frictionless roller coaster track. What was the minimum height from which it was released
A uniform horizontal rod of mass (M) and length (l) rotates with angular velocity (omega) about a vertical axis through its center. Determine the angular momentum of the system about the axis
After falling from rest from a height of 31 m, a 0.51-kg ball rebounds upward, reaching a height of 21 m. what average force was exerted on the ball
When red light in a vacuum is incident at the Brewster angle on a certain type of glass, the angle of refraction is 30.0°. What are the Brewster angle
An olive is at the bottom of a glass of alcohol (n = 1.36), 5.10 cm beneath the surface. what is the apparent depth d' of the olive
A small glass bead has been charged to + 30{\rm nC}. What is the magnitude of the acceleration of a proton that is 3.0{\rm cm} from the center of the bead
The head of a hammer with a mass of 1.5kg is allowed to fall onto a nail from a height of 0.70m, What is the maximum amount of work it could do on the nail
it has been suggested that rotating cylinders about 10 mi long and 5.0 mi in diameter be placed in space and used as
why to Assume charge 1 is located at the origin of x axis. A ball is thrown directly downward with an initial speed of 8.70 m/s, from a height of 30.6 m. After what time interval does it strike the ground.
An electron in a television picture tube travels at 3 x107 m/s and is acted on both by gravity and by theearth's magnetic field. Which exerts the greater force on the electron
if a quasar is 100 times more luminous than a bright galaxy absolute magnitude about -21 what is the absolute magnitude
During a basketball game, a 1.0 kg ball gets thrown vertically in the air. Its momentarily stationary at a height of 5.0 m and then falls back down. What is the ball's speed when it hits the floor?
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