Aperson is trying to judge whether a picture (mass = 1.14 kg) is properly positioned by temporarily pressing it against a wall. the pressing force is perpendicular to the wall. the coefficient of static friction between the picture and the wall is 0.720. what is the minimum amount of pressing force that must be used?

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.

The law of reflection states that the angle of reflection is equal to the angle of

Carbon tetrachloride (ccl4) is ionic or convalent