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Transcript of Acceleration
To know how to calculate acceleration
To know how to spot acceleation/deceleration in distance and speed/time graphs
A snail moves 5 metres in 2 hours.
If the snail moves at the same speed calculate:
(a) the time it takes to move 20 m
(b) the distance it would move in 3½ hours
(c) the time it takes to moves 1 m
Acceleration is the rate at which an object changes its speed. It's calulated using the equation: acceleration = change in speed / time taken.
Speed-time graphs illustrate how the speed of an object changes over time. The steeper the gradient of the line, the greater the acceleration.
acceleration = change in speed / time taken
A bus accelerates from 5 m/s to 25 m/s in 10s
Calculate its acceleration....
In everyday language we use 'accelerate' to mean speeding up and 'decelerate' to mean slowing down. In scientific terms 'acceleration' is the rate at which something changes its speed - faster or slower.
Acceleration depends on two things:
How much the speed changes
How much time the change in speed takes