There is a force of gravity between any 2 objects, so there must be one between e. g. a building and the Earth. The force of gravity increases with the mass of the object, since earth is so heavy, the force acting on it must be very large. But why the earth isn’t fallign towards the building?

Next a skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 15 with the horizontal. the rope moves parallel to the slope with a constant speed of 0.69 m/s. the force of the rope does 800 3 of work on the skier as the skier moves a distance of 8.4 m up the incline. (a) if the rope moved with a constant speed of 2.2 m/s how much work would the force of the rope do on the skier as the skler moved a distance of 8.4 m up the incline? at what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 0.69 m/s and (c) 2.2 m/s?

If you put a helium-filled balloon in the refrigerator, what will happen?

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.