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Physics: Post your doubts here!

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Help please?
Need help with question number 2 c (ii) from paper 22 of summer 2012.
I've attached the question.
Would highly appreciate any help. Thanks!
 

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Help please?
Need help with question number 2 c (ii) from paper 22 of summer 2012.
I've attached the question.
Would highly appreciate any help. Thanks!
The Potential Energy of the ball when it is at A changes to Kinetic Energy as the ball accelerates downwards (It's velocity increases, so KE also increases). After the ball hits the ground, it rebounds upwards with decreasing velocity and increasing height, so KE changes to Potential Energy.
 
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Al Salamou alaikom,
What is the number of Decimal Places to put our answer for VOLTAGE to in Paper 3 Practical when we put the Voltmeter/Multimeter to the 20V setting.
P.S. in the multimter, when we put setting to 20V, it gives us a reading with 2 d.p. i.e. 5.36 V so should we put our answer to 1 or 2 or no d.p.
 
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The Potential Energy of the ball when it is at A changes to Kinetic Energy as the ball accelerates downwards (It's velocity increases, so KE also increases). After the ball hits the ground, it rebounds upwards with decreasing velocity and increasing height, so KE changes to Potential Energy.
Thanks! :D
 
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Al Salamou alaikom,
What is the number of Decimal Places to put our answer for VOLTAGE to in Paper 3 Practical when we put the Voltmeter/Multimeter to the 20V setting.
P.S. in the multimter, when we put setting to 20V, it gives us a reading with 2 d.p. i.e. 5.36 V so should we put our answer to 1 or 2 or no d.p.
better if you use 5.36V
 
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Please answer me the iv question.... I tried to solve it but the answer that i got is twice the actual answers. i got Vb = 866 but the answer is 433... and For Va the answer is 250 and i got 500... Please tell me what's missing....
 

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in paper 5, when i want to draw a hall probe in the diagram for question 1.. do i draw a rectangular block as the hall probe or something like this? Screen Shot 2017-04-16 at 4.22.28 PM.png
 
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