Integration and kin...

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# Integration and kinematics Posts: 23
ExamQA+ A2 Maths, A2 Chemistry, A2 Biology, LSC Queensbury
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(@nilaani09)
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Joined: 3 years ago
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(@zeeshan)
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Average velocity is the mean of the 2 velocities at t = 5 and t = 8

And remember, to go from acceleration to velocity you integrate the acceleration equation. ExamQA+ A2 Maths, A2 Chemistry, A2 Biology, LSC Queensbury
(@nilaani09)
Joined: 3 years ago

Eminent Member
Posts: 23 (@zeeshan)
Joined: 4 years ago

Prominent Member
Posts: 770

@nilaani09

Hmm. Yes 116 is actually correct - my mistake.

What I said would only apply if the velocity was a linear equation, e.g. v = 2 + 4t or something like that.

Since your velocity equation ended up being non linear (a quadratic), you'd have to use the fact that average velocity = total displacement / total time.

So in other words, from your new velocity equation, integrate it one more time to find the equation for displacement, then work out the total displacement between t = 5 and t = 8. (plug them into the displacement equation then minus from each other). Once you've got the total displacement between the two times, divide by total time taken (8 - 5 = 3 seconds). You should end up with 116. ExamQA+ A2 Maths, A2 Chemistry, A2 Biology, LSC Queensbury
(@nilaani09)
Joined: 3 years ago

Eminent Member
Posts: 23

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