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A train travels 75 kilometers in 4 hours, and then 60 kilometers in 1 hours. What is its average speed?
A ball is rolled uphill a distance of 3 meters before it slows, stops, and begins to roll back. The ball rolls downhill 29 meters before coming to rest against a tree. What is the magnitude of the ball's displacement? m
What is the speed of a bobsled whose distance-time graph indicates that it traveled 106m in 25s? m/s
An object moving at 31m/s takes 5s to come to a stop. What is the object's acceleration? m/s2
Suppose you increase your walking speed from 5 m/s to 12 m/s in a period of 1 s. What is your acceleration? m/s2
A 3-cm-diameter cylinder rotates inside a fixed 4-cm-diameter cylinder with 40-C SAE-30 oil filling the space between the 30-cm-long concentric cylinders.
In a TV-show, an inexperienced doctor touches the electrodes of a defibrillator and gets thrown across the room, what is the maximum height above ground he could reach
a 13 g bullet traveling 222 ms penetrates a 2.0 kg block of wood and emerges cleanly at 159 ms. if the block is
In an engine, a piston oscillates with simple harmonic motion so that its position varies according to the expression, x = 4.00 cos (t +?/5), Find the period and amplitude of the motion
a mass less vertical spring is displaced 0.15 m when a 3.25 kg mass is attached. when used horizontally what is the
To push a 22 kg crate up a frictionless incline, angled at20° to the horizontal, a worker exerts a force of 88.5N, parallel to the incline. As the crate slides 1.50m, (a) how much work is done on the crate by the worker's applied force?
tarzan m 85.0 kg tries to cross a river by swinging form a vine. the vive is 10.0m long and his speed at the bottom of
A beam of 16MeV deuterons (m=2mp) from a cyclotron falls on a copper block. The beam is equivalent to a current of 15 microA, At what rate do deuterons strike the block
A fisherman is fishing from a bridge and is using a "33N testline." In other words, the line will sustain a maximum force of33.0 N without breaking.
Find theangular speed about the polar axis, as well as the translationalspeed and acceleration of a point on the earth’s surface at alatitude of 45°N. How do these values compare with the correspondingvalues for a point on the equator? (The radius of..
Using a mixture of CO2, N2, and sometimes He, CO2 lasers emit a wavelength of 10.8μm. How many photons per second does a CO2 laser deliver to the tissue during its use in an operation
Consider an ion with a charge of +1 e and a mass of 9 u (atomic mass units). If the ion is moving horizontally at a speed of 8 x 106 m/s when it enters a vertical magnetic field with a strength of 15.50 T, determine the radius of the path of the ion..
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