Forces

• The upward force on an object falling through the air is

• An astronaut is planning a trip to a newly discovered planet. According to the Law of Universal Gravitation, the astronauts weight on the new planet has less gravity than Earth

• When two forces on the same object are equal and opposite, these forces are called

• What is the weight of the box in the picture on the right .

• Consider a watermelon that starts from rest and is dropped straight down from a tall building. Air resistance can be ignored. Which statement about the watermelons motion is false?

• A man weighting 800 N is standing on a chair. In order to support the man, what force is the chair exerting

• Which of the following best describes how a swimmer moves through the water

• An object that is falling freely has a constant what?

• In the picture to the right, if the card were quickly pulled off the cup like the arrow suggests, what property would explain why the coin fall into the cup rather moving with the card

• The highest velocity a falling object will reach?

• The tendency of an object to resist changes in motion

• The attraction any two objects have on one another

• A net force acting on an object causes the object to accelerate in the direction of the net force

• Related to the amount of force needed to change an objects motion

38 B. What speed will the skydiver eventually reach? What is this speed called?

• Why does Terminal Velocity