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Steep safety ramps are built beside mountain highways to enable vehicles with defective brakes to stop. A 10-ton truck enters a 15?o ramp at a high speed v0 = 108 ft/s and travels for 6 s before its speed is reduced to 36 ft/s. Assuming constant deceleration, determine
(a) The magnitude of the braking force,
(b) The additional time required for the truck to stop. Neglect air resistance and rolling resistance.
The length of a spaceship is 56 meter when it is at rest. While it travels past you at close to the speed of light you measure its length to 41 meter. Determine what is the speed of the spaceship
Consider a three dimensional rectangular infinite potential well with sides of length L, 2L and 3L. What is the energy of the first excited state relative to the energy of the ground state
An experiment you're designing needs a gas with gamma = 1.66. What fractions of the molecules need to be monatomic
An object is placed to the left of a lens, and a real image is formed to the right of the lens. How far from the lens is the object
a 6.0-kg mass at the end of a spring vibrates 3.0 times per second with an amplitude of 0.13m. determine a the velocity
imagine two solenoids both 10 cm long one inside the other. the inner solenoid is 100 turns of wire wrapped around a
A block is sent up a frictionless ramp along which an x axis extends upward. The figure below gives the kinetic energy ofthe block as a function of position x; the scale of the figure's vertical axis is set by Ks =34.0 J.
An energy storage system based on a flywheel (a rotating disk) can store a maximum of 3.0 MJ, What is the moment of inertia of the flywheel
A block of mass M1=3.5kg moves with velocity v1=6.3m/s on a frictionless suface.It collides with block of mass M2=1.7kg which is initally stationary. What is the coefficient of kinetic friction on the rough surface
In a television picture tube, electrons strike the screen after being accelerated from rest throughout a potential difference of 28000 V.
Movers are pushing a 78.0 kg trunk at .710 m/s when they encounter a 2.25 m long stretch of floor where the coefficient of friction is 0.295. If they push by a steady force F= 220N,decide the speed of the trunk at the end of the 2.25m stretch?
an electron experiences the greatest force as it travels 1.7 106 ms in a magnetic field when it is moving southward.
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