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A uniform 450N and 7m long ladder rests against a smooth wall making a 30degree angle with wall. A 750 N man can climb up to 2.75m up the ladder before it begins to slip.
A. Find the normal force that the wall and floor exert on the ladder.
B. what is the frictional force on the ladder on the floor?
n = 3.10 mol of Hydrogen gas is initially at T = 388 K temperature and pi = 1.76×105 Pa pressure. The gas is then reversibly and isothermally compressed until its pressure reaches pf = 7.75×105 Pa. How much heat did the gas emit
The top of Mt. Everest is 8750 m above sea level. Assume that sea level is at an average Earth radius of 6.38×10^6 m. What is the magnitude of gravitational acceleration at the top of Mt. Everest? Mass of the Earth is 5.97×10^24 kg.
suppose that the displacement of your hand is 0.70 m as you throw the ball straight up. How long is the ball is in your hand.
A coffee filter of mass 1.5 grams dropped from a height of 1 m reaches the ground with a speed of 0.7 m/s. How much kinetic energy Kair did the air molecules gain from the falling coffee filter.
The primary coil of a transformer has N1 = 2.00 102 turns, and its secondary coil has N2 = 6.67 101 turns. what rms voltage is developed across the secondary coil
A car moves along the x-axis in the positive direction. Find the sign (+,-) of the velocity and acceleration of the car for each situation: 1. The car moves AWAY from the origin and gets FASTER 2.
An 8g bullet is fired at a speed of 216 m/s into a 190 g block that is initially at rest at the edge of a table of 1m height. The bullet fully embeds itself in the block before the bullet-block system launches off the table. How far in the x-direc..
question1a potters wheel having a radius 0.53 m and a moment of inertia 14 kgbullm2 is rotating freely at 53 revmin.
An 8.0-kg block is set moving with an initial speed of 6.0 m/s on a rough horizontal surface. how far does the block travel before it stops
Mark pushes his broken car 150m down the block to his friend's house. He has to exert a 110N force to push the car at a constant speed. How much Thermal Energy is created
q1. a 32 percent efficient electric power plant produces 900 mj of electric energy per second and discharges waste heat
A swimming pool requiring a 2.0 hp motor to filter and circulate the water runs for 18 hours a day. What is the monthly electricity cost for running this pool pump
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