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A 8.02 -m ladder with a mass of 21.2 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 260 N. At the instant the top of the ladder leaves the ground, the ladder experiences an angular acceleration of 1.79 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?
After a day of testing race cars, you decide to take your own 1580kg car onto the test track. While moving down the track at 10.0 m/s, you uniformly accelerate to 28m/s in 10 s. What is the average net force that you have applied to the car throug..
A 100-kg object and a 400-kg object are separated by 4.20 m. Find the magnitude of the net gravitational force exerted by these objects on a 64.0-kg object placed midway between them
A person can't see objects clearly that are closer than 80 cm. What is the refractive power of the contact lenses wouyld you prescribe
A ship has a mass of 40000 kg. its energy gives it an acceleration of 0.27 m/s while it travels a distance of 105 meters from rest. what force does the engine exert on the ship.
Two astronauts are, 3.18 m apart in their spaceship, speaking to each other. How far away from the Earth is the spaceship?
The coefficient of static friction between m1 and the horizontal surface is 0.60 while the coefficient of kinetic friction is 0.30. what will be the acceleration of the system
What is the net upward force on an airplane wing of area 27.8 m2 if the speed of air flow is 242 m/s across the top of the wing
A car starts from rest and moves with an acceleration of 1m/s for 1s. the motor is then turned off and the car is allowed to decelerate, Calculate the total distance traveled by the car
The vitreous humor, a transparent, gelatinous fluid that fills most of the eyeball, What are ranges of wavelength, frequency and speed of light
questiona the proton-proton chain efficiently converts hydrogen into helium according to 4h rarr4 he. a helium 4
A 9.00-V battery delivers a current of 1.35 A to the lightbulb filament of a pocket flashlight. Calculate the power delivered by the battery
A speeder passes a parked police car at 30 m/s. At that instant, the police car starts from rest with a uniform acceleration of 2.44 m/s2.
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