A -Level Physics: - The Physics Doctor - Home

A -Level Physics: - The Physics Doctor - Home

A Level Physics: Just a moment. Objectives: Spec point 23: be able to use the equation for the moment of a force, moment of force = Fx where x is the perpendicular distance between the line of action of the force and the axis of rotation Spec point 24: be able to use the concept of centre of gravity of an extended body and apply the principle of moments to an

extended body in equilibrium Additional Skills Gained: Extra Skills Gained: Balancing moments Logic Puzzle The Monty-Hall Problem https://www.youtube.com/watch?v=9vRUxbzJZ9Y Lesson Link: Fermi Question

An arrow is shot at 40o from the horizontal, how far does it go both vertically and horizontally? Now your turn Who reckons they are the strongest in the class?! Also. A prize for anyone who can determine who I am. You really should know meIm pretty epic.

A little bit of history. https:// www.youtube.com/watch?v=0v86Yk14 rf8 10mins A new geezer A prize for anyone who can

determine who I am. You really should know meIm pretty epic. A little bit of history. https:// www.youtube.com/watch?v=9sdxiHyRr Cs 10mins

A new geezer The class must decide on the STRONGEST member of the class and the WEAKEST member. 10mins Just a moment..

Will the strongest member of the class please step forward. I propose a challenge. With your little finger. Try to push the door open. Your finger must be close to the hinge Just a moment.. Will the weakest member of the class please step forward. I propose a similar challenge.

With your little finger. Try to push the door open. Your finger must be close to the handle Moments A moment is the tendency of a force to cause rotation. It is defined by the following equation Moment (Nm) = Force (N) X Perpendicular distance (m) (from the pivot to line of action of the force)

Force applied Perpendicular Distance To get the same rotation, why was it harder to push the door from near the hinge? Flashback When forces on an object are balanced (in equilibrium), the object is either.

Flashback When forces on an object are balanced (in equilibrium), the object is either. When the moments (clockwise and anticlockwise) on an object then the object is either ROTATIONAL EQUILIBIRUM

Moments in action After the demo, pick up a smaller version of the set up and have a play. Use the knowledge you have gained to keep it balanced. Then draw a diagram of one example where its balanced taking necessary measurements Practice Questions A 2m plank (10kg) is placed upon a triangular pivot at the 1m mark. On the left hand side a 6kg mass is

placed 0.2m away from the pivot. On the other a mass is placed 0.8m away. The plank remains balanced. Calculate the mass of on the right hand side. A This time there are two masses each side. On the left is a 1kg mass 0.8m away from the pivot and a 2kg mass 0.4m away. On the right is a 2.5kg mass 0.3m

away and an unknown mass 0.8m away. Calculate the value of the unknown mass if the plank balances. Another 2m plank (10kg) is placed on a pivot as shown. On the left, mass A is placed 0.4m away from the pivot at the end of the plank. On the right, a 1.8kg mass (mass B) is placed 1.2m away from the pivot. Calculate the mass of mass A. The plank is now balanced. A

A B B C B

D Extra Challenge A 24cm spanner is used at 30o from the horizontal with a force of 20N vertically downward. What is the moment exerted on the spanner?

Recently Viewed Presentations

  • 10. Potentials and Fields

    10. Potentials and Fields

    Gauge Transformations Equations for the retarded potentials Spherical waves Green's Function Retarded Potentials Infinite straight wire Change of variables in a volume integral Moving point charge Point charge at constant velocity The field of a moving point charge Point charge...
  • SSA-RCO collaboration in GA

    SSA-RCO collaboration in GA

    3 Symposiums facilitated - Continued growth of Network and RCOs. 2018 - 3 Symposiums, $4 million appropriation of Addiction Recovery Support Centers. Kickoff to Recovery! A $4 million legislative appropriation in 2018. We do this like we do recovery.
  • Name of Presentation

    Name of Presentation

    Presentation Overview . Features of College Success Course. CollegeScope . Demo. The Lone Star College System: Achieving the . Dream. The Advising . Component. Research on Program Effectiveness
  • Bathrooms - John J. Macionis

    Bathrooms - John J. Macionis

    Restrooms: The Pursuit of Social Justice. Sociology. Chapter 8: Sexuality and Society. Society: The Basics. Chapter 6: Sexuality and Society. Although the idea may seem strange to some students, one important setting in which the pursuit of social justice has...
  • Enrollment Review Committee

    Enrollment Review Committee

    In August 2017 all grade six students will attend JHE or JHW, converting to middle school program for grades 6-8. HANOVER RESEARCH DISCUSSION. Impacts of School and Class Size on Student Outcome. Key Findings. Elementary School Enrollment Redistribution.
  • Surgery in advanced pulmonary arterial hypertension and ...

    Surgery in advanced pulmonary arterial hypertension and ...

    Surgery in advanced pulmonary arterial hypertension and Eisenmenger's syndrome. ... who responded to PA banding with regression of Pulmonary hypertension. ... Surgery in advanced pulmonary arterial hypertension and Eisenmenger syndrome
  • Managing acute heart failure in the Emergency Department

    Managing acute heart failure in the Emergency Department

    Managing Acute Heart Failure in the Emergency Department. Patient Case Study. 1. Case Introduction. 3. Initial Diagnosis . and Care Plan. 2. Case Details and Initial Triage
  • Incident Management and the NIMS - FEMA

    Incident Management and the NIMS - FEMA

    Comparative Emergency Management Session 28 Slide Deck Session 28 * Session 28 * Session Objectives Define the International Financial Institutions Describe the Emergency Management Efforts of the World Bank International Financial Institutions International banks made up of two or more...