Because the snow suddenly gets too slushy, you decide to carry your 100-n sled the rest of the way home. how much work do you do when you pick up the sled, lifting it 0.5 m upward? how much work do you do to carry the sled if your if your house is 800 m away?

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?