Vitorr classes

A constant force F=m2g/2 is applied on the block of mass m1 as shown in figure (5-E10). The string and the pulley are light and and the surface of the table is smooth. Find the acceleration of m1.

Consider the situation shown in the figure (5-E9). All the surfaces are friction-less and the string and the pulley are light. Find the magnitude of the acceleration of the two blocks.

Figure (5-E8) shows a uniform rod of length 30 cm having a mass of 3.0 kg. The strings shown in the figure are pulled by constant forces of 20 N and 32 N. Find the force exerted by the 20 cm part of the rod on the 10 cm part. All the surfaces are smooth and the strings and the pulleys are light.

Consider the Atwood machine of the previous problem. The larger mass is stopped for a moment 2.0 s after the system is set into motion. Find the time elapsed before the string is tight again.  

In a simple Atwood machine, two unequal masses m 1   and m 2   are connected by a string going over a clamped light smooth pulley. In a typical arrangement (figure 5-E7)  m 1  = 300g and m 2  =600g. The system is released from rest. (a) Find the distance travelled by the first block in the first two seconds. (b) Find the the tension in the string. (c) Find the force exerted by the clamp on the pulley.     

A force F=vxA is exerted on a particle in addition to the force of gravity, where v is the velocity of the particle and A is a constant vector in the horizontal direction. With what minimum speed a particle of mass m be projected so that it continues to move undeflected with a constant velocity ?