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A person with mass of 70kg is climbing a ladder with a length of 6 m and the ladder has a mass of 20kg that leans against a smooth, frictionless wall. A frictional force between the ladder and the floor keeps it from slipping. The angle between the ladder and the wall is 30 degrees - What is the magnitude of the frictional force of the floor so that the person can reach the top of the ladder?
The source of a sound wave has a power of 1.60 µW. Assume it is a point source. What is the sound level at that distance
A motorcycle is traveling up one side of a hill and down the other side. Determine the maximum speed that the cycle can have
A planet orbits a star, in a year of length 4.58 x 107 s, in a nearly circular orbit of radius 2.85 x 1011 m. With respect to the star, determine the angular speed of the planet
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0682 s, determine the vertical components of the launch velocity.
A small .500 kg object moves on a frictionless horizontal table in a circular path of radius 1 m. The angular speed is 6.28 rad/s. The object is attached to a string of negligible mass that passes through a small hole in the table at the center of..
What is an acceleration of the car
What is the least radius of the circular path? (b) At this radius, what is the force causing the centripetal acceleration of the pilot.
it accelerates with a constnat acceleration of 2.00 m/s^2 until its engines stop at an attitude of 200 m. the rocket continues move in free fall until its reaches the ground. Illustrate what is the total time the rocket is in the air?
A technician wraps wire around a tube of length 40.0 cm having a diameter of 7.90 cm. find the self-induced emf in the solenoid?
Two charged spheres are 15 cm apart. They are moved, and the force on each of them is found to have been quadrupled. How far apart are they now.
a railroad car o.f mass 2.25 x 10^4 kg is traveling east 5.50 m/s and collides with a railroad car of mass 3.00 x 10^4 kg traveling west 1.50 m/s, find the velocity of the railroad cars
A 1.93kg block is placed against a compressed spring on a frictionless 27degree incline. How far up the incline will the block go before coming to rest
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