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Transcript
Access 3/Intermediate 1 Physics Unit 5 â Movement 5.1 1 2 3 4 5 6 7 8 9 Forces Describe how to use a Newton balance to measure force. State that weight is a force and is the Earthâs pull on an object. Calculate weight using: weight = 10 ï´ mass. State that the force of friction can oppose the motion of a body. Describe one way in which friction can be increased. Describe one way in which friction can be decreased. State that streamlining reduces the effect of air friction on a body. Describe two features of a car which improve streamlining State that equal forces acting in opposite directions are called balanced forces. 5.2 1 2 Speed and acceleration Describe how to measure average speed Calculate average speed using: average speed = distance Time Describe how to measure instantaneous speed. Describe the term acceleration. 3 4 5.3 1 2 3 4 Moving bodies Describe how the effect of a collision increases with the mass and the speed of the objects involved. State that the change in speed of an object increases with: (a) the size of the force acting (b) the time the force acts. State that the range of a ball thrown at an angle is affected by: (a) the speed of the throw (b) the angle of the throw. State that the height a ball rebounds on hitting a surface is affected by: (a) the speed on impact (b) the type of surface. L Hogg @ Glenwood 2005
