sticks

Shown below are seven situations where a student is holding a meter stick at the left end at various angles. A 1.0 kg mass is hung on the meter sticks at different locations. The meterstick is held stationary in all cases. All of the meter sticks are identical, but the distance along the meter stick at which the 1.0 kg mass is hung and the angles at which the student holds the meter stick vary. Specific values are given in each figure. (Ignore the mass of the meter stick.) Which of the following statements are true about the situations depicted in the figures above? (Give ALL correct answers: B, AC, BCD.., or None ) A) The torque is the same in pictures A and B B) The lever arm... click for more

fish mobile

The mobile in the figure below is in equilibrium. The object B has mass of 0.605 kg. Determine the mass of object C. Assume L1 = 28.0 cm, L2 = 7.60 cm, L3 = 13.6 cm, L4 = 5.90 cm, L5 = 16.1 cm and L6 = 5.90 cm. (Neglect the weights of the crossbars.)

springs in water

A light spring of constant k = 164 N/m rests vertically on the bottom of a large beaker of water (see Fig. a). An m = 4.63 kg block of wood (density = 630 kg/m3) is connected to the spring and the mass-spring system is allowed to come to static equilibrium (see Fig. b). What is the elongation, DeltaL, of the spring?

Finding the volume of a mass that is not submerged in an ocean.

An object with a density of 671 kg/m3 and a mass of 1723 kg is thrown into the ocean. Find the volume that sticks out of the water (use pseawater = 1024 kg/m3). Refer to the attachment below for an illustration.

Applied Mechanics Velocity

A 1 kg object is dropped from the horizontal while attached to a string 80 cm long, tied at the same height as the object. When the string is vertical after the object is dropped, the object strikes a 2 kg block on a frictionless horizontal surface. The impact is 100% elastic. What will be the velocities of both objects after impact?