Mass, height, acceleration due to gravity (g). State the Principle of Conservation of Energy. [2008][2005][2013] Energy cannot be created or destroyed; it can only be changed from one form to another. [2006] [2002] [2007 OL] Define Power Power is the rate at which work is done. [2005 OL][2007 OL] What is the unit of power? The watt. Circular Motion Define (i) velocity [2006] and (ii) angular velocity. [2006][2005][2013] Velocity is the rate of change of displacement. Angular velocity is the rate of change of angle with respect to time. [2013] Name the type of acceleration that the ISS experiences as it travels in a circular orbit around the earth. Centripetal What force provides this acceleration? Gravitational Even though the hammer [moving in a circle] moves at a constant speed, it accelerates. Explain. [2012] The direction changes (continuously) Define [2005] ‘Centripetal Force’ Centripetal Force is the force - acting in towards the centre - required to keep an object moving in a circle. The moon orbits the earth. What is the relationship between the period of the moon and the radius of its orbit? [2009]The period squared is proportional to the radius cubed. Give an expression for centripetal force. [2004] Centripetal force is required to keep the earth moving around the sun. [2004][2013] What provides this centripetal force? In what direction does this centripetal force act? Gravitational pull of the sun. Towards the centre. What is the period of a geostationary communications satellite? [2013] One day/ 24 hours Simple Harmonic Motion State [2014][2009][2007] [2003] [2002][2011] Hooke’s Law. Law states that when an object is stretched the restoring force F is directly proportional to the Hooke’s displacement provided the elastic limit is not exceeded A mass at the end of a spring is an example of a system that obeys Law. Hooke’s Give two other examples of systems that obey this law. [2002][2012] Stretched elastic, pendulum, oscillating magnet, springs of car, vibrating tuning fork, object bobbing in water waves, ball in saucer, etc.
Mass, height, acceleration due to gravity (g). State the Principle of Conservation of Energy. [2008][2005][2013] Energy cannot be created or destroyed; it can only be changed from one form to another. Define Power [2006] [2002] [2007 OL] Power is the rate at which work is done. What is the unit of power? [2005 OL][2007 OL] The watt. Circular Motion Define (i) velocity [2006] and (ii) angular velocity. [2006][2005][2013] Velocity is the rate of change of displacement. Angular velocity is the rate of change of angle with respect to time. [2013] Name the type of acceleration that the ISS experiences as it travels in a circular orbit around the earth. Centripetal What force provides this acceleration? Gravitational Even though the hammer [moving in a circle] moves at a constant speed, it accelerates. Explain. [2012] The direction changes (continuously) Define ‘Centripetal Force’ [2005] Centripetal Force is the force - acting in towards the centre - required to keep an object moving in a circle. The moon orbits the earth. What is the relationship between the period of the moon and the radius of its orbit? [2009]The period squared is proportional to the radius cubed. Give an expression for centripetal force. [2004] Centripetal force is required to keep the earth moving around the sun. [2004][2013] What provides this centripetal force? In what direction does this centripetal force act? Gravitational pull of the sun. Towards the centre. What is the period of a geostationary communications satellite? [2013] One day/ 24 hours Simple Harmonic Motion State Hooke’s Law. [2014][2009][2007] [2003] [2002][2011] Hooke’s Law states that when an object is stretched the restoring force F is directly proportional to the displacement provided the elastic limit is not exceeded A mass at the end of a spring is an example of a system that obeys Hooke’s Law. Give two other examples of systems that obey this law. [2002][2012] Stretched elastic, pendulum, oscillating magnet, springs of car, vibrating tuning fork, object bobbing in water waves, ball in saucer, etc.
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