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*I said 19.6 N, because the only force acting there would be gravity, right? so 9.8*2 = 19.6 N*

2. an object that weighs 3m explodes and into two pieces that weigh 2m and m. Which is the only statement that can be true?

I narrowed it down to two choices

1. the pieces fly off perpendicular to one another

2. the smaller piece has a velocity two times greater than the larger piece.

I chose the 2nd choice

1. the pieces fly off perpendicular to one another

2. the smaller piece has a velocity two times greater than the larger piece.

I chose the 2nd choice

3. A car is moving east. A second car is traveling due north. During the collision, the 2nd car has a resulting velocity due south (opposite direction). What is the only possible direction of the 1st car?

*A graph was given with choices that the 2nd car can move west, east, north, north west, or north east. The conservation of momentum obviously comes into play. I screwed up here and chose that it goes west.*