Suppose a car tire rotates 3 times in 1 sec. The tire has a diameter of 0.5 m. Calculate the circular (AKA tangential) speed.

Two particles of masses m and 2m are placed on a smooth horizontal table. a string, which joins these two masses, hangs over the edge supporting a pulley, which suspends a particle of mass 3m.the pulley has negligible mass. the two parts of the string on the table are parallel and perpendicular to the edge of the table. the hanging parts of the string are vertical. find the acceleration of the particle of mass 3m.

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

The charge on a charged sphere is: a)concentrated at its centerb)distributed uniformly throughout its volumec)clustered on its centerd)distributed uniformly over its surface