Atwo-stage rocket moves in space at a constant velocity of +4890 m/s. the two stages are then separated by a small explosive charge placed between them. immediately after the explosion the velocity of the 1380-kg upper stage is +5660 m/s. what is the velocity (magnitude and direction) of the 2970-kg lower stage immediately after the explosion?

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .