Advertisements
Advertisements
Question
A boy of mass 30 kg is fitting at a distance of 2 m from the middle of a see-saw. Where should a boy of mass 40 kg sit so as to balance the see-saw?
Advertisements
Solution
By the principle of moments 30 × 2 = x × 40
∴ Other boys should sit at a distance
x =`(30xx2)/40`
= 1.5 m
RELATED QUESTIONS
In a beam balance, when the beam is balanced in a horizontal position, it is in ______ equilibrium.
State the principle of moments. A meter scale is pivoted at 30 cm mark and it is in equilibrium when a mass of 40 g is suspended from 10 cm mark. Calculate the mass of the ruler.
Give scientific reason for the following:
While climbing a hill you will try to bend your body forward.
The arms of a beam balance are 20 cm and 21 cm, but the pans are of equal weight. By the method of double weighing the weights are found to be 1000 g and 20 g. Find the actual weight of the body
What is meant by equilibrium and state the conditions of equilibrium of a body?
Give an experiment to verify the principle of moments.
Explain the types of stability with suitable examples.
A non uniform beam of weight 120 N pivoted at one end is shown in the diagram below. Calculate the value of F to keep the beam in equilibrium.
Give one example of static equilibrium.
