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From users who are members of Maths Support Wiki - Mechanics :
Christian Lawson-Perfect
|
said | Ready to use | 8 years, 3 months ago |
| Amy Chadwick | said | Needs to be tested | 8 years, 5 months ago |
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Christian Lawson-Perfect 8 years, 3 months ago
Gave some feedback: Ready to use
Christian Lawson-Perfect 8 years, 3 months ago
Saved a checkpoint:
Clarified the wording in the statement a bit, and it seems that the other things have been fixed.
Christian Lawson-Perfect 8 years, 3 months ago
Gave some feedback: Has some problems
Christian Lawson-Perfect commented 8 years, 4 months ago
Oh, and again you need to say in the prompt what precision you want, when you set a precision restriction in the marking.
Christian Lawson-Perfect commented 8 years, 4 months ago
In GeoGebra, hide the points that don't need to be drawn, such as the ones on either end of the acceleration vector.
a)Need to specify units in "the mass of the particle $K = ...$". Stick an $\mathrm{N}$ after the input to show that the answer is in Newtons. The input line should go
$C = $ [[0]] $\mathrm{N}$
b)Use
c)\simplify- I got $1gN$ whenFD = 1. You need to say which direction to resolve the force in, or ask to find the magnitude of the force.Decelerating in which direction? You've set up a 2D problem sort of needlessly, because the components are completely independent.
Why change the mass of the particle? Say you're considering a different particle. How is this part different to part a?
d)Again, this is the same as part b but with different numbers - maybe split this into two separate questions. And again you need to use
\simplifywhen giving the force $B$.The prompt should say "now there is a net force of ... acting downwards". But how do you know the net force? You'd work it out from observing the acceleration. This question could go as follows:
- Set up: the particle has mass $K\, \mathrm{kg}$, and is accelerating at $a\, \mathrm{ms^{-2}}$ vertically downwards.
- First part: What is the total force acting on the particle?
- Second part: a downwards force of $D \, \mathrm{N}$ and a downwards force $B$ are being applied to the particle. What is the magnitude of $B$, in Newtons?
You could have one question considering vertical acceleration, and another for horizontal.
Christian Lawson-Perfect commented 8 years, 4 months ago
Use
\mathrmon units so you don't get italics, e.g. $5\mathrm{ms}^{-1}$
Amy Chadwick 8 years, 5 months ago
Gave some feedback: Needs to be tested
Amy Chadwick 8 years, 5 months ago
Created this.| Name | Status | Author | Last Modified | |
|---|---|---|---|---|
| Particle in vertical equilibrium, accelerating horizontally | Ready to use | Amy Chadwick | 24/08/2016 10:50 | |
| Particle in vertical equilibrium, accelerating horizontally | Needs to be tested | Chris Graham | 08/12/2016 11:23 | |
| Simon's copy of Particle in vertical equilibrium, accelerating horizontally | draft | Simon Thomas | 29/04/2019 09:19 |
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