See this suggested solution.
1. Let a force F' is the vector sum of the forces P and Q, then it is shown on the attached picture and marked with red color.
2. according to the condition the force F holds the object, then F should have the same length as the force F' and the opposite direction.
3. using the conditions described in 2. the answer is C.
Answer: Sí, toda la energía cinética se puede perder si las dos masas se detienen debido a la colisión.
Explanation:
Answer: 1300m
Explain: from km to m times 1000
The force between two parallel wires carrying currents in the same direction is attractive. It is repulsive if the currents are in opposite directions.
I believe it is A. positive acceleration since it is speeding up
