PLEASE HELP ITS TIMED WILL GIVE POINTS A packing crate of mass m is pulled across the floor at a constant velocity
by means of a rope attached to the front of the crate. The rope makes
an angle of θ with the floor. The coefficient of kinetic friction between
the floor and the crate is µk. What value of θ will make the tension in the
rope a minimum?

Coal contains energy. a. light b. kinetic c. chemical d. mechanical

An electron and a proton are held on an x axis, with the electron at x = + 1.000 m and the proton at x = - 1.000 m. part a how much work is required to bring an additional electron from infinity to the origin? express your answer with the appropriate units. part b if, instead of the second electron coming in from infinity, it is initially at x = + 20.00 m on the axis and is given an initial velocity of 100.0 m/s toward the origin, does it reach the origin? part c how close to the origin does it come?

Which term defines a powers shared by state and federal governments? a. concurrent. b. expressed. c. implied. d. reserved