A uniform metre rule of mass 100 g is balanced on a fulcrum at mark 40

1.	A uniform metre rule of mass 100 g is balanced on a fulcrum at mark 40 cm by suspending an unknown mass m at the mark 20 cm. (i) Find the value of m. (ii) To which side the rule will tilt if the mass m is moved to the mark 10 cm ? (iii) What is the resultant moment now ? (iv) How can it be balanced by another mass of 50 g ?
Answer» A uniform metre rule of mass 100 g is balanced on a fulcrum at mark 40 cm by suspending an unknown mass m at the mark 20 cm. (i) Find the value of m. (ii) To which side the rule will tilt if the mass m is moved to the mark 10 cm ? (iii) What is the resultant moment now ? (iv) How can it be balanced by another mass of 50 g ?

A uniform metre rule of mass 100 g is balanced on a fulcrum at mark 40 cm by suspending an unknown mass m at the mark 20 cm. (i) Find the value of m. (ii) To which side the rule will tilt if the mass m is moved to the mark 10 cm ? (iii) What is the resultant moment now ? (iv) How can it be balanced by another mass of 50 g ?

Answer»

A uniform metre rule of mass 100 g is balanced on a fulcrum at mark 40 cm by suspending an unknown mass m at the mark 20 cm.

(i) Find the value of m.

(ii) To which side the rule will tilt if the mass m is moved to the mark 10 cm ?

(iii) What is the resultant moment now ?

(iv) How can it be balanced by another mass of 50 g ?