Cavendish Experiment and Gravitational Constant

The video tutorial explains how English scientist Henry Cavendish first determined the Universal Gravitational Constant (G) in 1798. It describes Cavendish's experimental setup involving small lead spheres and larger spheres, which create gravitational forces and torque. The tutorial details the mathematical process to calculate G, using the relationship between gravitational and restoring torque. The currently accepted value of G is also mentioned.

Who was the first scientist to experimentally determine the Universal Gravitational Constant?

• Galileo Galilei

• Albert Einstein

• Isaac Newton

• Henry Cavendish

In Cavendish's experiment, what is the role of the large spheres S1 and S2?

• They are used to measure temperature

• They repel the small spheres

• They attract the small spheres with gravitational force

• They provide a magnetic force

What happens to the suspended wire in Cavendish's experiment when gravitational forces act on it?

• It breaks

• It twists

• It melts

• It remains unchanged

Which mathematical expression is used to calculate the gravitational constant G in Cavendish's experiment?

• G = tau theta / d square mL

• G = mL / tau theta d square

• G = tau theta d square / m mL

• G = m mL / tau theta d square

What is the currently accepted value of the Universal Gravitational Constant G?

• 3.00 x 10^8 m/s

• 9.81 m/s^2

• 6.67 x 10^-11 N m^2/kg^2

• 6.67 x 10^11 N m^2/kg^2