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You swing a 1.65-kg rock tied to a rope in a vertical circle of radius 0.75 m. When the rock reaches the top its speed in 3.25 m/s.
A.) Calculate the acceleration of the rock at the top and show it's direction.
B.) Calculate the tension in the rope at the top of the circle.
C.) What minimum speed should the rock have at the top for the rope to remain barely taut?
D.) With minimum speed at the top in part (d), what will be the speed of the rock when it comes to the bottom? Neglect air resistance and use of conservation of energy.
The starship Enterprise leaves a distant earthcolony, which is nearly at rest with respect to the earth. The shiptravels at nearly constant velocity toward earth. When the Enterprise reaches earth 1.08 y has elapsed, as measured on the ship .Clock..
The figure shows a zero-resistance rod sliding to the right on two zero-resistance rails separated by the distance L = 0.381 m. The rails are connected by a 13.1 ohm resistor, and the entire system is in a uniform magnetic field with a magnitude o..
After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 46.0 cm. What is the value of the acceleration of gravity on this planet
If the person can view the image produced by the microscope with a completely relaxed eye, and the magnification is -4825, what is the focal length of the objective
A merry-go-round starts from rest and accelerates uniformly over 23.5 s to a final angular velocity of 6.25 rev/min. Find the person's maximum radial acceleration
A near-sighted woman cannot focus on any object farther away than a distance x = 57 cm. Find the focal length of the lens which will correct her vision
A nonconducting spherical shell of inner radius R1 and outer radius R2 has a uniform volume charge density ?. find the total charge on the shell
When two lenses are used in combination, the first one forms an image that then serves as the object for the second lens. Find the location and height of the image
A power supply maintains a potential difference of 86.1 V across a 1070-? resistor. What is the current in the resistor
A bicyclist coasts down a 5.39° slope at a steady speed of 8.37 m/s. Assuming a total mass of 87.1 kg (bicycle plus rider), what must the cyclist's power output be to pedal up the same slope at the same speed
A system consisting of one positively charged particle and onenegatively charged particle is altered by an outside force so thatits potential energy increases by 6.25 mJ. There is no changein kinetic energy between the initial and final states of ..
A 7.0 g bullet is fired into a 1.5 kg ballistic pendulum. The bullet emerges from the block with a speed of 200 m/s, and the block rises to a max height of 12 cm. Find the initial speed of the bullet.
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