(Original post by jph12)
I saved all my answers on my graphical calculator. I do not remember the questions, and will edit this thread according to the general feedback of the answers. Some of these may be wrong, again, these are simply my answers.
Updated version, 19:03 24th May 2012. I have included some very general "questions", so people can jog their memories to the question. A small summary follows the x), and the answer is the bit after the colon (
. Again, any errors, please let me know so I can edit them. Question 6c) changed according to the general consensus.
1 - Ship on water:
a)Resultant Velocity: 5.39
2 - Momentum
3 - Car braking to a halt
ai)Acceleration of car the car, using uvast, I think: -2 (therefore, deceleration).
3aii)Can't remember: 10
3aiii) Without any other forces except braking force - 2800N
3b) With an air resistance of 200N - 2600
4 - Particle in equilibrium. Force of 20N going at an angle of alpha, and in the opposite direction, a force of 10N.
a)Find alpha: 60
5 - Block and particle system.
a)When smooth, acceleration: 5.88
bi)When rough, tension: 122.4
biii)Coefficient of friction: 0.735
c)Assumptions made: No air resistance, block is uniform in mass.
6 - Some stupid girl with a sledge, who has most probably cost a lot of people a few marks, for forgetting the Tcos30.
a)Diagram, I think, of the forces acting on the sledge when modelled as a particle.
b)Find NR in terms of T: NR = 78.4 - 0.5T
c)Find tension when acceleration is 0.05: 23.5
7 - Vector question. Unsure of the following questions. i
a)Unsure. Maybe express t in terms of s
b)Again, unsure: 30
c)Find the speed when going SE. Needed to form an equation of v
t, not s
8 - Projectile. She fires at an angle of alpha with speed 22.4.
a)Find alpha: 61 degrees
b)Find maximum height: 19.6
c)Find horizontal distance(?): 43.4
d)This is wrong, however, partially right, need confirmation of a full answer: 3.69
e)Hmm, again, can't remember, can anyone?: 10.8