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Suppose there is a rollercoaster on a frictionless track. It is at the top of the track (the part where the rollercoaster suddenly drops off and you lose your stomach) and at the bottom of the track there is a loop of radius R. How high must the hill be, in terms of R, for the loop to be completed?
A 45.0-N force stretches a vertical spring0.250 m. What mass must be suspended form the spring so that the system will oscillate with a period of 2.50 s?
Review Conceptual Example 7 as an aid in solving this problem. Aportable electric heater uses 14 A ofcurrent. The manufacturer recommends that an extension cordattached to the heater dissipate no more than 2.3 W of power per meter of cord length.
An 79-kg stuntman jumps from a window of a building situated 33 m above a catching net. Assuming that air resistance exerts a 100-N force on the stuntman as he falls, identify his velocity just before he hits the net.
A grandfather clock is controlled by a swinging brass pendulum that is 1.3 m long at a temperature of 30.°C. What is the change in the length of the pendulum rod
A thin rod of length 0.80 m and mass 210 g is suspended freely from one end. find the rod's kinetic energy at its lowest position
A 2.3 kg pendulum bob is pulled out such that its center of mass is 0.26 m above its lowest point and released. What is the gravitational potential energy of the pendulum
a speech signal has a total duration of 20 sec. it is sampled at the rate of 8 khz and then pcm encoded. the
An object is launched with an initial velocity of 8.0 m/s to the horizontal from 327cm above the ground level. What is the final speed of the object
in what ways do photons resemble other particles such as electrons? in what ways do they differ? do photons have mass?
A 1000N force inclined at 40 degrees with the horizontal is applied to move a block mass 150kg. compute the normal force acting on block
the solar wind is a thin hot gas given off by the sun. charged particles in this gas enter the magnetic field of the
a baseball is thrown from the roof of a building of height 20.6 with an initial velocity of magnitude 14.0 and directed
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