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an archer shoots an arrow toward a 300-g target that is sliding in her direction at a speed of 250 ms on a smooth
you launch a small rocket up into the air the rocket has a constant total acceleration of 12ms2 and burns for 10
an energy storage system based on a flywheel a rotating disk can store a maximum of 40 mj when the flywheel is rotating
a small spherical bead of mass 305 g is released from rest at t 0 in a bottle of liquid shampoo the terminal speed is
a projectile is fired with an initial speed of 113 ms at an angle of 600deg above the horizontal from the top of a
an object of mass 30 kg and travelling at 20 ms collides head-on with a 20 kg object travelling in the opposite
a bullet with a mass of 40 g and a speed of 650 ms is fired at a block of wood with a mass of 0095 kg the block rests
a softball of mass 0220 kg that is moving with a speed of 55 ms collides head-on and elastically with another ball
a stone is thrown horizontally outward from the top of a bridge the stone is released 196 m above the street below the
a sky diver of mass 810 kg jumps from a slow-moving aircraft and reaches a terminal speed of 515 msa what is the
a wooden plank is raised at one end to make an angle of 30deg to horizontal a 20 kg box is placed on the incline 10 m
the current in a coil changes from 31 a to 19 a in 053 s if the average emf induced in the coil is 15 mv what is the
a copper bar is moved to the right while its axis is maintained in a direction perpendicular to a magnetic field as
a 190 m length of wire is held in an east-west direction and moves horizontally to the north with a speed of 152 ms the
consider a conical pendulum with a 860 kg bob on a 100 m wire making an angle of 700deg with the vertical consider
in a cyclotron one type of particle accelerator a deuteron of atomic mass 200 u reaches a final speed of 110 of the
in the bohr model of the hydrogen atom the speed of the electron is approximately 230 106 msa find the force acting on
a light string can support a stationary hanging load of 230 kg before breaking a 300 kg object attached to the string
a person is riding a bicycle and its wheels have an angular velocity of 115 rads then the brakes are applied and the
huck finn walks at a speed of 6ms across his raft that is perpendicular to the rafts motion relative to the shore the
you leave your 100 w portable color tv on for 4 hours each day and you do not pay attention to the cost of
in a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 470 nma
consider an engine operating with a monatomic ideal gas of 05 moles on a 3 stroke cycle with a pv diagram shown below
the de broglie wavelength is lambda hp but the momentum of a relativistic particle is not mv using the relativistic
a wheel mass 754 kg radius 168 cm rolls without slipping down the side of a hill initially the wheel is at rest 145 m