Answer:
For the first situation, we first need to find the mass of the second train car.
In order to do that, we apply the conservation of the amount of movement:
and we have as a result:
m2 = 289.6875
For the second situation, also we will apply the conservation of the amount of movement:
and we have as a result:
V = 2.64 (it is moving to the right)
Answer:
800 N/C to the right
Explanation:
The relationship between electric force, electric field and charge is
where
E is the electric field
F is the force acting on the charge
q is the charge
In this problem, we have
is the force
is the charge
Substituting into the formula, we find the electric field magnitude
Concerning the direction:
- The electric field and the force have same directions if the charge is positive
- The electric field and the force have opposite directions if the charge is negative
Here the charge is positive, so the electric field has same direction as the force: therefore, to the right.