(By Newton's third law, the small pulley exerts an equal and
opposite force on the leg.) Let the mass m be 2.50 kg.
37. Two blocks are connected by a string, as shown in Figure 25.
The smooth inclined surface makes an angle of 42° with the
horizontal, and the block on the incline has a mass of 6.7 kg.
Find the mass of the hanging block that will cause the system to
be in equilibrium. (The pulley is assumed to be ideal.)
6.7 kg
42°
FIGURE 25 Problem 37
m
41
5. : Highly sensitive ammeters can measure currents as small as 10.0 fA.How many electrons per second flow through a wire with a 10.0-fA current?