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According to Newton's 3rd law of motion, what happens whenever one object exerts a force on a second object?
The second object exerts an equal and opposite force on the first object.
The equal and opposite forces described by Newton's 3rd law are called _____ and _____ force.
action, reaction
TRUE or FALSE: Newton's 2nd law describes action-reaction forces.
False
TRUE or FALSE: Forces always exist in pairs.
True
TRUE or FALSE: Action-reaction forces never cancel.
True (because they work on different objects!)
TRUE or FALSE: All action-reaction forces produce motion.
False
TRUE or FALSE: Action-reaction forces do not cancel each other out because the action force is always greater than the reaction force.
False
Which of the following factors affect the momentum of a moving object: mass, volume, shape, velocity
mass and velocity
If two identical objects are moving at different velocities, the object that is moving faster will have _________ momentum.
greater/more
Your in-line skates are sitting in a box on a self in the closet. What is their momentum?
zero
TRUE or FALSE: An object with a small mass can have a large momentum if the object is traveling at a high speed.
True
What is the momentum formula, including the correct units?
momentum (kg*m/s) = mass (kg) * velocity (m/s)
Calculate momentum: A 700-gram bird flying at a velocity of 2.5 m/s.
1.75 kg*m/s
Calculate momentum: A 1000-kg car traveling at 5 m/s.
5000 kg*m/s
Calculate momentum: A 40-kg shopping cart rolling along at 0.5 m/s.
20 kg*m/s
Calculate momentum: A 300-kg roller coaster traveling at 25 m/s.
7500 kg*m/s
