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A smooth 2-kg collar is attached to a spring having a stiffness of 3 N/m and an unstretched length of 0.75m. If the collar is released from rest at point. A, determine its acceleration and the normal force on the rod at the instant that y= 1m. The force of the spring is found by F=ks, where k is the stiffness and s is the distance the spring is stretched length. please explain.
A horizontal force of magnitude 46.1 N pushes a block of mass 3.64 kg across a floor where the coefficient of kinetic friction is 0.554. find the increase in the kinetic energy of the block
The cubit is an ancient unit. Its length equals six palms. (A palm varies from 2.50 to 3.50 inches depending on the individual.) We are told Noah's ark was 300 cubits long, 50 cubits wide and 30 cubits high.
At a time t = 2.60s , a point on the rim of a wheel with a radius of 0.180m has a tangential speed of 55.0m/s as the wheel slows down, Calculate the wheel's constant angular acceleration
Draw a motion diagram for the train. Assume that the train is moving toward the right and starts to slow down at t = 0. The separation of each dot represents an elapsed time of one second.
An electron is projected vertically upward with a speed of 1.65x10^6 m/s into a uniform magnetic field of 0.160 T that is directed horizontally away from the observer. What would the radius of the circle be.
A 200 ohms resistor has a current of 1.5A running through it and is connected in series with 300 ohms resistor. What is the emf of the battery
You are playing raquetball at the rec center. When you are 10 m away from the wall you hit a ball 16 m/s towards the wall at an angle of 30 degrees. How high above the launch point does the ball hit the wall
The electric potential is given by (50 V/m7)(xz6 + x3y4) in the region of space that includes the point (x,y,z) = (-2,7,-3) m
An object of mass m moves in a circular orbital under the influence of an harmonic oscillator potential U(r)=1/2(alpha)r^2, Determine the energy of the orbiting object
The pupil of an eagle's eye has a diameter of 6.0 mm. Two field mice are separated by 0.010 m. How much time passes until the eagle sees the mice as separate objects
Two identical parallel-plate capacitors, each with capacitance C, are charged to potential difference ?V and then disconnected from the battery. Find the total energy of the system of two capacitors before the plate separation is doubled
About 50000 years ago, a meteor crashed into the earth near present-day Flagstaff, Arizona. How much kinetic energy did this meteor deliver to the ground
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