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A diver stands on a diving board as shown in attached diagram. The centre of gravity of the diving board is marked CG. If the force of gravity on the diver is 528N and the force of gravity on the board is 372N, how much force does support X exert on the board?

A. 900 N
B. 1700 N
C. 1900 N
D. 2600 N

2. What is the final speed of electrons which are accelerated from rest through a potential difference of 9.1 x 10^2 V in the gun of a cathode ray tube?

A. 3.0 x 10^6 m/s
B. 1.3 x 10^7 m/s
C. 1.8 x 10^7 m/s
D. 3.2 x 10^14 m/s

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