The question is not complete
The acceleration of the bike is 
Explanation:
We can solve this problem by using Newton's second law of motion, which states that:

where
F is the net force on an object
m is the mass of the object
a is its acceleration
For the bike in this problem, we have
F = 175 N is the net force
m = 50 kg is the mass
And solving for a, we find the acceleration:

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Answer:
Conditions for Superconductivity
The material must be cooled below a characteristic temperature, known as its superconducting transition or critical temperature (Tc). ... The magnetic field to which the material is exposed must be below a characteristic value known as the critical magnetic field (Hc).
Answer:
is applied to
Explanation:
An input force is push or pull that is applied to the machine and causes work to be done on it.
Input force for every machine should be lesser than the output force. The output force is the resulting force which produces work.
The force produced by any machine is a function of the input force and the design of the machine.
Any force applied to a machine is the input force.