Achild sits motionless on a swing. which of the following forces does not act on the swing?

In the image, the arrow is pointing to a celestial object. which attribute disqualifies the object from being a planet?

What you see with your eyes is a form of energy. a. light b. heat c. chemical d. electrical

To practice problem-solving strategy 10.1 for energy conservation problems. a sled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slides a distance d1 down the slope and then covers the distance d2 along the horizontal terrain before stopping. find the coefficient of kinetic friction μk between the sled and the ground, assuming that it is constant throughout the trip.