A net force of 25.0 N causes an object to accelerate at 4.00 m/s2. What is the mass of the object?
2 answers:
Answer:
Mass, m = 6.25 kg
Explanation:
It is given that,
Net force acting on the object, F = 25 N
Acceleration of the object,
Let m is the mass of the object. Using Newton's second law of motion. The force is given by :
F = ma
m = 6.25 kg
So, the mass of the object is 6.25 kg. Hence, this is the required solution.
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Answer:
,
Explanation:
The magnitude of the electromagnetic force between the electron and the proton in the nucleus is equal to the centripetal force:
where
k is the Coulomb constant
e is the magnitude of the charge of the electron
e is the magnitude of the charge of the proton in the nucleus
r is the distance between the electron and the nucleus
v is the speed of the electron
is the mass of the electron
Solving for v, we find
Inside an atom of hydrogen, the distance between the electron and the nucleus is approximately
while the electron mass is
and the charge is
Substituting into the formula, we find