Aproton is traveling horizontally to the right at 4.40×106 m/s .
part a
find (a)the magnitude and (b) direction of the weakest electric field that can bring the proton uniformly to rest over a distance of 3.20 cm .
e =
nothing
n/c
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part b
? =
nothing
? counterclockwise from the left direction
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part c
how much time does it take the proton to stop after entering the field?
t =
nothing
s
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part d
what minimum field ((a)magnitude and (b)direction) would be needed to stop an electron under the conditions of part (a)?
e =
nothing
n/c
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part e
? =
nothing
? counterclockwise from the left direction

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j. b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.