A boy has a catapult made of a rubber cord of length `42 cm` and diameter `6.0 mm`. The boy stretches the cord by `20 cm` to catapult a stone of mass `20 g`. The stone flies off with a speed of `20 ms^(-1)`. Find Young's modulus for rubber. Ignore the change in the cross section of the cord in streching.

A boy's catapult is made of rubber cord which is 42cm long, with 6mm diameter of cross-section and of negligible mass. The boy keeps a stone weighing 0.02kg on it and stretches the cond by 20cm by applying a constant force. When released. The stone flies off with a velocity of 20ms^(-1) . Neglect the change in the area of cross-section of the cord while stretched. The Young's modulus of rubber is closet to:

A catapult consists of two parallel rubber strings each of lengths, 10 cm and cross sectional area 10mm^(2) . When stretched by 5 cm , it can throw a stone of mass 10 gm to a vertical height of 25 m . Determine Young's modulus of elasticity of rubber.

A catapult consists of two parallel rubber strings, each of lengths 10cm and cross sectional area 10mm^2 .When stretched by 5cm, if can throw a stone of mass 100g to a vertical height of 25m. Determine Young’s modulus of elasticity of rubber.

A catapult consists of two parallel rubber strlings each of lengths, 10 cm and cross sectional area 10mm^(2) . Wen struetched by 5 cm , it can throw a stone of mass 10 gm to a vertical height of 25 m . Determine Young's modulus of elasticity of rubber.

A catapult consists of two parallel rubber cords each of length 20cm and cross-sectional area 5cm^(2) . When stretched by 8cm , it can throw a stone of mass 4gm to a vertical height 5m , the Young's modulus of elasticity of rubber is [g = 10m//sec^(2)]

A rubber cord has a cross -sectional area 1 mm^(2) and total unstretched length 10.0cm . It is streched to 12.0 cm and then released to project a missile of mass 5.0 g.Taking young's modulus Y for rubber as 5.0xx10^(8) N//m^(2) .Calculate the velocity of projection .