What Goes Up Must
Come Down
Come Down
While an object is in free fall (no air resistance), this is the ONLY force acting on it.
What is gravity?
A quantity that has BOTH magnitude (size) and direction.
What is a vector?
On a free body diagram, each arrow represents one of these acting on the object.
What is a force?
Newton's First Law is also called the Law of ____.
What is Inertia?
Write the equation for Newton's Second Law.
What is A: F = ma? (net force = mass × acceleration)
State Newton's Third Law
What is "For every action force there is an equal and opposite reaction force"?
Patrick Star drops a rock off a cliff in Bikini Bottom (use Earth's gravity). What is the rock's acceleration while it falls?
What is 9.8 m/s² downward?
Vector or scalar? "Noah Lyles ran 100 m east."
What is a vector (it is a displacement: size + direction)?
The upward, perpendicular push a table exerts on a book resting on it.
What is Normal force?
The tendency of an object to resist any change in its motion.
What is the Law of Inertia?
The SI unit of force, equal to 1 kg·m/s².
What is the newton (N)?
Action-reaction force pairs always act on ____ objects, so they never cancel each other out.
What is "Different"? (two different objects)
Mario steps off a ledge from rest. How fast is he falling after 2 seconds? (v = gt)
What is 19.6 m/s downward?
This is Travis Kelce displacement if he runs 30 m north, then 10 m south.
What is 20 m north?
Garfield is napping on a table. Name the two forces on his free body diagram.
What is gravity pulling down and normal force pushing up?
This property of an object is the measure of how much inertia it has.
What is Mass?
Simone Biles acceleration as she pushes a 4 kg gym mat with a net force of 20 N.
What is 5 m/s²?
The thing that pushes CeeDee Lamb forward when his cleats push backward on the turf.
What is the turf (ground) pushing forward on his cleats?
Spider-Man drops his phone from rest off a building. It falls for 3 seconds. How far does it fall? (d = ½gt²)
What is 44.1 m?
This is the resultant force if Dora pushes a crate 15 N east while Boots pushes it 10 N east.
What is 25 N east?
Scooby-Doo slides across the kitchen floor. Name the force that points opposite his motion.
What is Friction?
The reason that Homer Simpson's donut fly forward off of his dashboard when he slams on the brakes.
A: What is Inertia? (The donut keeps moving forward because no force stopped it when the car stopped)
The weight of Miles Morales's 60 kg training dummy on Earth (W = mg)
What is 588 N?
The direction that the gas pushes the SpaceX rocket when the hot exhaust gas pushes downward.
What way is up?
Steph Curry shoots a ball straight up. At the very top of its path, its velocity is ____ and its acceleration is ____.
What is Velocity = 0 m/s; acceleration = 9.8 m/s² downward?
This is the magnitude of Lightning McQueen's displacement if he drives 30 km east, then 40 km north. (a² + b² = c²)
What is 50 km?
Bad Bunny's 50 N stage light hangs motionless from a single cable. What is the tension in the cable?
What is 50 N (forces are balanced)?
The object with more inertia: a 120 kg football tackling sled pushed by Patrick Mahomes or Bart Simpson's 5 kg skateboard.
What is the tackling sled? (It has more mass.)
The net force needed to accelerate Lightning McQueen (1,500 kg) at 2 m/s²?
What is 3,000 N?
Which feels the bigger force: the bug or the Batmobile when the bug splats on the Batmobile's windshield.
What is "Neither"? (the forces are equal in size and opposite in direction)
Linus drops the Great Pumpkin from a roof. It hits the ground moving 29.4 m/s. How long did it fall? (t = v/g)
What is 3 seconds?
Shrek pulls a cart 6 N east while Donkey pulls 8 N north. Give the resultant force AND its direction.
What is 10 N at north-east?
The net force of a FBD that shows 30 N right, 12 N left, 20 N up, and 20 N down.
What is 18 N to the right?
In deep space, Buzz Lightyear lets go of a wrench moving at 4 m/s. Describe its motion afterward.
What is moving at 4 m/s in a straight line forever? (no net force acts on it)
The acceleration of a 10 kg box that Luigi pushes right with 50 N while friction pulls left with 20 N.
What is 3 m/s² to the right?
The reason that if the bug and the Batmobile feel equal force only the bug gets flattened.
What is "the bug has a much smaller mass" (so the same force gives it a much larger acceleration (a = F/m))