The mass is moving by uniformly accelerated motion, with initial velocity

and acceleration

. Its position at time t is given by the following law:

where we take the initial position

since we are only interested in the distance traveled by the mass.
If we put

into the equation, the corresponding time t is the time it takes for the mass to travel this distance:


And the two solutions for the equation are:

--> negative, we can discard it

--> this is the solution to our problem
Answer:
1.43 kg
Explanation:
We can solve the problem by using Newton's second law:

where
F is the net force on an object
m is its mass
a is its acceleration
For the squirrel in the problem, we have:
is the acceleration
F = 5 N is the net force acting on it
Solving for m, we find its mass:

Answer:
18.99u or 19u
Explanation:
Mass number=No of protons+No of neutrons


- Fluorine has atomic number=9
- The Electronic configuration is given by
