A student attaches a rope to a brick and pulls the brick across a rough surface at a constant speed. The forces thatshould be included in a free body diagram for the brick are: gravity
force of friction
normal force
tension force

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft