Author Question: Three masses are located as follows: a 3.0-kg mass is at the origin, a 4.5-kg mass at (0.0 m, 4.0 ... (Read 103 times)

jho37 · **on:** Jul 29, 2018

Three masses are located as follows: a 3.0-kg mass is at the origin, a 4.5-kg mass at (0.0 m, 4.0 m), and a 2.5-kg mass at (3.0 m, 0.0 m). What is the gravitational energy of the system of masses? G = 6.67 x 10-11 Nm2/kg2.

A) -3.8 10-10 J
B) -3.9 10-10 J
C) -5.4 10-10 J
D) -3.2 10-10 J
E) -3.5 10-10 J

Question 2

A car starts out when the air temperature is 288 K. The air pressure in the tires is 500 kPa. After driving a while, the temperature of the air in the tires increases to 298 K.

What is the pressure in the tires at that point, assuming the volume remains constant? A) 129 kPa
B) 483 kPa
C) 507 kPa
D) 517 kPa
E) 532 kPa