Asked by jordan

A 3 meter tall 40 degree inclined plane with a coefficient of friction of .3 with a box sliding from its top has this acceleration and final velocity.
Answered by bobpursley
Initial PE= mg*3
frictionwork:mg*mu*Cos40*3/sin40

intialPE-workdonebyfriction=finalKE
Answered by morgan
two pint charges are 4 cm apart. They are moved to a new distance of 2 cm. By what factor does the resulting mutual forces between them change.

a. 1/2
b. 2
c. 1/4
d. 4
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