How will you carry out an experiment to estimate 'g'?
1. measure h from bottom of ball to trapdoor 2. flick switch to simultaneously start timer and disconnect electromagnet to release ball 3. ball falls knocking trapdoor breaks circuit stops timer
11 of 17
What equation will you use in the experiment to estimate 'g'?
h = 0.5gt^2
12 of 17
Why does this experiment only give an estimate of 'g'?
errors - measurement of h done with ruler +/-1mm uncertainty // dwarf errors from switch delay or timer
13 of 17
describe horizontal velocity in projectile motion
constant as no force acting
14 of 17
describe vertical velocity in projectile motion
constant 'uniform acceleration' as only 'g' acting
15 of 17
How would you draw vector on a projectile motion diagram
horizontal v is the same // vertical v goes upwards then decreases to 0 at max point, change in direction to negative velocity
16 of 17
How would you calculate the maximum height/ displacement on an object?
at this point Vf=0 so resolve equations using that assumption
17 of 17
Other cards in this set
Card 2
Front
What forces act on an object when it is in free fall?
Back
only weight (W=mg)
Card 3
Front
What is weight?
Back
Card 4
Front
What is weight measured in?
Back
Card 5
Front
What does acceleration of free fall look like on a displacement-time graph?
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