ZC. The forward force of the surfboard's acceleration is balanced by the backward force of the surfer's mass.
Answer: 20.765 m/s
Explanation:
This problem can be solved by the conservation of energy principle, this means the initial energy 
must be equal to the final energy 
:
(1)
Where each energy is the sum of kinetic energy 
and potential energy 
:
(2)
Where:
Being 
your mass and 
your initial velocity, since the roller coaster sterted from rest.
Being 
the acceleration due gravity and 
your initial height
Being 
your final velocity
Being 
your final height
Rewritting (2):
(3)
(4)
Isolating :
(5)
(6)
Finally:
This is your spedd when you arrive at 3 m height
Answer&Explanation:
Since dimensional formula is the way of expressing physical quantity in terms of it's dimension;
Mass per unit area will be,,
Mass=M
Area=L×L=L²
Therefore dimensional formula is=ML^-2 and not M/L²
Answer:
F=mass x acceleration
1000= 2000 x a
a=1000/2000
a=1/2 m/sec^2
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