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A 100 kg man is three fourths of the way up a 10 m ladder that is resting against a smooth frictionless wall. The ladder has a mass of 25 kg and makes an angle of 60 degrees with the ground.
a. What is the normal force of the wall on the ladder?
b. What is the normal force of the floor on the ladder?
A 2600-pF air-gap capacitor is connected to a 9.0-V battery. If a piece of Pyrex glass (K=5) is placed between the plates
Thermal expansion increases the length of a clock's pendulum by a fractional increase of 4.1×10^-5, Under these conditions, how much error in timekeeping accumulates over 1 day
Two small spheres spaced 35.0 apart have equal charge. How many excess electrons must be present on each sphere
A lawn mower of 25kg is pushed a horizontal distance of 10 m by 50N downward force directed 60 degrees to the horizontal. What is the work done by each force on the lawn mower
The rope is initially swung around the axis, causing the wood to have a tangential velocity of 4.0 m/s. After one revolution the wood is observed to have a speed of only 2.1 m/s.
How much longer does the trip take. Find out the acceleration of each mass and the tension in the string that connects them.
An RLC circuit has a 400 ohms resistance a 2.5 mH inductor and a capacitor. what is the power dissipated by the circuit
The resistivity of the body is a good measure of its overall composition. A measure of the resistance of the upper arm is a good way to estimate the percent fat in a person's body. What is the resistance of the arm
n 1730 kg car stopped at a traffic light is struck from the rear by a 865 kg car. The two cars become entangled, what is the change in kinetic energy
A car that is traveling at 25.0 m/s is 42.5 m away from a wall. what is the magnitude of the cars acceleration
two vehicles of equal mass at a 90 degree intersection. If the momentum of vehicle A is 1.20 x 10^5 kg km/h east and the momentum of vehicle is 8.50 x 10^4 kg km/h north, what is the resulting momentum of the final mass
Zach, whose mass is 83kg , is in an elevator descending at 10m/s . The elevator takes 3.4s to brake to a stop at the first floor. What is Zach's weight before the elevator starts braking
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