A 1-kg rock is suspended by a massless string from one end of a

1-m measuring stick. What is the weight of the measuring stick if it is

balanced by a support force at the 0.25-m mark?

Respuesta :

Answer:

The weight of measuring stick is 9.8 N

Explanation:

given information:

the mass of the rock, [tex]m_{r}[/tex] = 1 kg

measuring stick, x =1 m

d = 0.25 m

to find the weight of measuring stick, we can use the following equation:

τ = Fd

τ = 0

[tex]F_{r} d[/tex] - [tex]F_{s}d[/tex] = 0

F_{r} = the force of the rock

F_{s} = the force of measuring stick

[tex]F_{s} =F_{r}[/tex]

    = m g

    = 1 kg x 9.8 m/s

    = 9.8 N

thus, the weight of measuring stick is 9.8 N