Wednesday, October 28, 2015

Year 9 - Physics - 28-10-15

Fill in the Blanks by using the words given in the box.
Slope,   speed,                  distance,             horizontal,          40,          higher,                72,          meters
Speed is equal to ________ divided by time and can be measured in _________ per second.
A speed of 20 m/s is the same as ______ km/h which is approximately equal to ______ mph.
The _________ of a distance against time graph can be used to calculate ________. The greater the gradient of the line the __________ is the speed.  The line will be ___________ when the speed is zero.

Speed,  zero,      slowing,               direction             squared               circle     Velocity
Velocity is speed measured in a particular ______________.
A person walking northwards will have _______ velocity in a westwards direction.
Acceleration is equal to ________ change divided by the time taken. Acceleration is measured in metres per second ______.
Deceleration occurs when a body is _________ down.  It is possible for a body to be accelerating even when its ______ is not changing provided its direction is, for example: a body moving in a ________.

Bicycle Ride Distance/Time Graph
Stacie and Jordan went out cycling one day. The graph below shows how far they traveled during the ride.

  1. How far did they travel in total?

  1. For how long were they cycling?

  1. What was their average speed for this ride? Include the units.
_______________________________________________________________________________________________________________

  1. Between which two points did they travel fastest?
________________________________________

  1. How can you tell this from the graph?
_________________________________________

  1. For how long did they stop for lunch?
_________________________________________

  1. Calculate their speed between points A and B. Include the units.
___________________________________________________________________________________________________________________________

  1. Calculate their speed between points C and D. Include the units.
___________________________________________________________________________________________________________________________





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