Two boxes, m2 = 10 kg and m1 =15 kg, are attached to each other by a lightweight string and are pulled by another string attached to m1 . If the string pulling the box in the front has a force
of 500 N. what is the acceleration of m1 assuming the strings are kept taut? Neglect resistance
forces.
50 m/s/s
33.3 m/s/s
20 m/s/s
10 m/s/s

Scout feels ill one day before school. her mother puts a thermometer in her mouth and the temperature begins to climb to 100°f. what is happening between the cooler thermometer and scout's body? a) scout's body is applying a force to the particles in the thermometer. b) kinetic energy is being transferred from her mouth to the thermometer. c) potential energy is being lost by the thermometer and gained by scout's body. d) the potential energy stored in foods is converted to mechanical energy to raise the mercury in the thermometer.

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)