1. Collect all the apparatus needed as indicated from the apparatus 

2. Set up the experiment by following the diagram. 

3. Pour 10cm3 of hydrochloric acid using a measuring cylinder. 

4. Pour the hydrochloric acid into a beaker and measure its 
temperature for two minutes by using a thermometer. 

5. Pour 10cm3 of sodium hydroxide using a measuring cylinder. 

6. Pour the sodium hydroxide into a beaker and measure its temperature 
by using a thermometer. 

7. Pour both hydrochloric acid and sodium hydroxide into the polythene 

8. Stick in a thermometer to measure its temperature for two minutes 
by using a stopwatch. 

9. Collect the evidence and record it in a neat table. 

10.Do this procedure each time. 

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Change in Velocity (m/s)
Acceleration =
M/S2 Time taken for change (s)
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Terminal Velocity
· Falling through a Increases Up thrust
1. Object is accelerating with (constant)
downwards increasing
Weight > Up thrust + Drag
2. As the object accelerates, Weight (constant)
drag increases with
increasing velocity. When
Weight = Up thrust + Drag
there is 0 overall force and )
therefore no acceleration. (1
This is called TERMINAL )
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Weight = Mas x Gravitational Field Strength
(N) s (N/kg)
10 N/Kg on earth
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Resultant Force
· If the resultant force on a moving object is
not zero, the body will accelerate in the
direction of the resultant force.
Resultant Force = Mass x Acceleration
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Stopping Distance
· The greater the speed of the vehicle, the greater the
braking force needed to stop it.
· A drivers reaction time can be affected by:
­ Tiredness
­ Drugs
­ Alcohol
· A vehicle's braking distance can be affected by:
­ Adverse Road Conditions
­ Bad weather conditions
­ Poor condition of vehicle.
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