-8.0 36-450655) =(4579
4) An 65-kg baseball player slides into second base. The coefficient of kinetic
friction between the player and the ground is 0.49. (a) What is the magnitude
of the frictional force? (b) If the player comes to rest after 16 s, what was his
initial velocity?

You have been called to testify as an expert witness in a trial involving a head-on collision. car a weighs 1515 lb and was traveling eastward. car b weighs 1125 lb and was traveling westward at 44.0 mph. the cars locked bumpers and slid eastward with their wheels locked for 22.5 ft before stopping. you have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750 . how fast (in miles per hour) was car a traveling just before the collision? (this problem uses english units because they would be used in a u.s. legal proceeding.)

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?

Describe uniform velocity and variable velocity in short