Equivalence of Inertial and Gravitational Mass

Mr. Andersen explains the equivalence principle, highlighting the equivalence of inertial and gravitational mass. He discusses historical contributions from Galileo, Newton, and Einstein, leading to the theory of relativity. The video includes experiments using a ruler to measure mass through oscillations and balance, demonstrating the equivalence of mass measurements. The video concludes with a discussion on the implications of these findings and their relevance to physics.

Who was the first scientist to note the equivalence of inertial and gravitational mass?

• Niels Bohr

• Isaac Newton

• Albert Einstein

• Galileo Galilei

What is the relationship between inertial and gravitational mass according to the video?

• Gravitational mass is always greater

• Inertial mass is always greater

• They are equivalent

• They are completely different

What is the primary method to measure inertial mass?

• Using a balance scale

• Using a pendulum

• Applying a force and measuring acceleration

• Measuring the gravitational pull

In the ruler experiment, what was the effect of adding mass to the ruler?

• The ruler broke

• The oscillation time decreased

• The oscillation time remained the same

• The oscillation time increased

What was the time taken for the ruler to oscillate with 20 grams added?

• 3.0 seconds

• 11.8 seconds

• 7.4 seconds

• 10.4 seconds

What was the approximate inertial mass of the penny in the experiment?

• 10 grams

• 3 or 4 grams

• 5 grams

• 1 gram

How was the gravitational mass of the penny determined in the experiment?

• By measuring the force of gravity directly

• By using a pendulum

• By balancing it with a known mass on a ruler

• By using a spring scale

Which scientist used pendulums to explore the equivalence of mass?

• Galileo Galilei

• Niels Bohr

• Isaac Newton

• Albert Einstein

What did Einstein's thought experiment with rockets demonstrate?

• The difference between inertial and gravitational mass

• The universe is expanding

• The equivalence of acceleration and gravity

• The speed of light is constant

What principle did Einstein use to build his general theory of relativity?

• The uncertainty principle

• The principle of superposition

• The equivalence principle

• The conservation of energy