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Consider a mass of 20Kg on the left and another 10kg on the right connected by a rope and being pulled to the right with an acceleration of 0.5 m/s^2. What is the tension on the right rope? Book answer is 25N calculated as follows: Tension on left rope is 10N because Fnet=Ftension(20kg) (why?) Tension on right rope is 25N which is Fnet=Ftension(10kg) - Ftension(10kg) (why?) or 15 + 10 Please explain book answer and tension equations.
An object with a height of 4.0 cm is placed 30.0 cm from a lens. The resulting inverted image has a height of 1.5 cm. What is the focal length of the lens
A bucket of mass m is tied to a massless cable that is wrapped around the outer rim of a frictionless uniform pulley of radius R. what must be the moment of inertia of the pulley
A playground merry-go-round has a radius of 4.30 m and a moment of inertia of 245 kg/m^2 and turns with negligible friction about a vertical axle through its center. What is the average power supplied by the child
a string 60 cm longfastened at each end. when driven by an oscillator at frequency of120 Hz L=.60m. ym=.02m. f=120Hz. wavelength=.30, ind wavelength in air of soundwave produced by vibratingstring
A sodium-vapor lamp has power output of 10.0 W. Using 589.3 nm as the average wavelength of this source, calculate the number of photons emitted per second
What is the minimum thickness of coating which should be placed on a lens in order to minimize reflection of 646 nm light? The index of refraction of the coating material is 1.32 and the index of the glass is 1.57.
Consider an RC circuit in which the capacitor is beingcharged by a battery connected in the circuit. After a time equalto three time constants, what percentage of the final charge is present on the capacitor?
A torque of 60 Nm producing a counterclockwise rotation is applied to the wheel about its axle. A frictional torque of 10 nm acts at the axle.If the wheel is observed to accelerate at the rate of 2rad/s2 under the influence of these torques, what i..
A small lightbulb is 1.04 from a screen.If you have a convex lens with 19 focal length, where are the two lens locations that will project an image of the lightbulb onto the screen? What’s the magnification in the first case (smaller distance from th..
A simple pendulum consists of a ball connected to one end of a thin brass wire. Determine the change in the period of the heated pendulum
what formula do i use to find electric potential? units? what formula do i use to find potential energy? units? if you
A person exerts a force of 48 N on the endof a door 86 cm wide. What is the magnitude of the torque if the force is exerted perpendicular to the door?
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