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A 10 cm tall tablet computer was placed vertically 20 cm from a plane mirror. Its image distance was found to be 20 cm. Use the data given to calculate the height of the image.
A flywheel that is a solid disc and initially at rest, has a force of 20.0 N applied tangentially to its rim for 10.0 s. The flywheel is 365 mm in diameter and has a mass of 30.5 kg, and the bearings have a friction torque of 0.450 N m.
a) Determine the torque applied to the flywheel
b) Calculate the moment of inertia of the flywheel
c) What is the angular acceleration of the flywheel during the 10 s?
d) How much kinetic energy does the flywheel have at t=10 s?
A 2.8 kg block slides on a frictionless 20 degree inclined plane. A force of 23 N acting parallel to the incline and up the incline is applied to the block. The block is moving upward. What is the acceleration of the block?
explain the processof carbon dating. c+* has a half-life of 5730 years? an archaeological sample is found with a carbon 14 to carbon12 ratio of 1/8. what is the age of the sample?
ω=120rev/min then it changed to 180rev/min in∆θ=4rev
first find angular acceleration and then find ∆t
The stress of concrete is given by the following relationship
Ϭ = F (max) / A
The project manager wants you to create a stable modular system for compacting concrete so that all project staff can understand it
A lever is used to lift a stone of mass 10kg which is 1m from the fulcrum. If the force is to be applied at 2m in the other side of the fulcrum, what is the minimum value of the force in order to lift the stone?
the biosphere is composed of
1. A point charge q is placed at a distance r from center of a conducting neutral sphere of radius R (>R). The potential at any point P inside the sphere at a distance r, from point charge due to induced charge of the sphere is given by
the acceleration of a particle varies with time as a=4t+1 initially particle started from rest and was at x=4m.then find velocity at t=4uc. and position as a function of time and average velocity till 1uc
