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A 1.20 kg ball and a 4.00 kg ball are connected by a 74.0 cm long massless, rigid rod. The structure rotates about its center of mass at 230 rpm. What is the rotational kinetic energy of the structure?
The Dyson sphere is an hypothetical spherical structure centered around a star. Inspired by a science fiction story, What is the net gravitational force Fin on a unit mass located on the inner surface of the Dyson sphere described in Part A
q1. a 245 ball is tied to a string. it is pulled to an angle of 5.20 and released to swing as a pendulum. a student
A 7.80-g bullet moving at 500 m/s penetrates a tree trunk to a depth of 5.40 cm. find the average frictional force that stops the bullet
questiona cart of mass m 1.80 kg can roll without friction on a level track. a light string draped over a light
Bob and Ray push on a door from opposite sides. They both push perpendicular to the door. Bob pushes 0.63 m from the door hinge with a force of 89 N. What is the net torque on the door
Consider a swinging pendulum with length l= 10 cm, a mass of 1 gm swinging at the end of it with an amplitude, Calculate the total energy ( potential plus kinetic) in ergs of the swinging pendulum
Vector A has a magnitude of 11 and points in the positive x-direction, with the positive x-axis. What is the magnitude of A and B
A uniform electric field of magnitude 395 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. What is the work done by the field on the electron
An underwater camera has a lens of focal length 35.0 mm and a maximum aperture of f/2.80 . The film it uses has an emulsion that is sensitive to light of frequency 6.00×10^14 Hz. If the photographer takes a picture of an object 2.80 m in front of ..
A 280 block on a 58 long string swings in a circle on a horizontal, frictionless table at 90.0 . What is the speed of the block.
If the car in problem 1 traveled at 36.0km/h during the first part of the trip and at 90.0km/h during the remainder, Calculate the average velocity for each part of the trip
A 0.366-kg block is attached to a horizontal spring that is at its equilibrium length, and whose force constant is 20.3 N/m. How far does the putty-block system compress the spring
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