A nut can be opened by a lever of length 0.25 m by applying a force of 80N. What should be the length
of lever, if a force of 32 N is enough to open the
nut?
[0.625m)

Awheelhas a radius of 4.8 m. howfar (path length) does a point on the circumference travel if thewheel is rotated through angles of 30°, 30 rad, and 30 rev,respectively?

What is the final velocity of the initial velocity of 25 and -50?

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?