Ms. Zacharer's Classroom


M45, The Pleiades

M45, Mel22 Open Cluster and reflection nebula in Taurus 

(Imaged in LRGB July-August 2022, Haystack-ATMoB Observatory, Westford, Massachusetts)

Introduction to Physics

Question of the Week: 

Explain the difference between the 

(a) force of gravity, 

(b) a gravitational field and 

(c) gravitational field strength 

Question of the Week: 

Where would you weigh the most on Earth?

Last Week's Answer:

How do you measure mass on the ISS?

You can use:

Newton's Second Law (m = F/a) to calculate an unknown mass (m) against measures of applied Force and acceleration; (The ISS's MMD uses this technique) OR 

Newton's Third Law (Conservation of Momentum  mv = MV) to calculate an unknown mass (m) against a known mass (M) and measures of their respective reactive velocities V and v.