Graphite is a form of pure carbon that
a. exists in the shape of a hollow ball
b. is formed at very high temperatures
c. has layers that can slide past each other
d. is arranged in long, hollow cylinders

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.

Explain vector addition, triangle method and parallelogram method

Acar moves at 12m/s and coasts up a hill with a uniform acceleration of -1.6m/s2. how far has it traveled after 6.0s?