# Edexcel IAL mechanics 3 9 Jan 2020Watch

#1
How did everyone find that?
0
2 weeks ago
#2
Normal
0
2 weeks ago
#3

1. Coefficient of friction. Its too small?? 0.0056

2. Kinematics
Distance is 0.5
Force is 0.016

3. Circular motion with bowl
I got the show that.
Using Theta and 2 theta. Circle theory rule

4. Hookes Law
Instantaneous change in acceleration is 3.92
2 × friction ÷ mass

5. Vertical circle
52 : 49

6. Simple harmonic motion
omega is root 250
Amplitute is root 10 / 10
Time is 0.293

7. Centre of mass
0.54 final ans
0
#4
How did you do the instantaneous change in acceleration question?
0
1 week ago
#5
Initial
Tension - [email protected] + Friction = ma

Final
Tension - [email protected] - Friction = ma

Change in a = 2 × Friction ÷ m
0
1 week ago
#6
by considering the directions of frictional force before reaching instantaneous rest and after reaching instantaneous rest the resultant forces are different and then calculate the change in acceleration
0
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