A water rafter is storing what kind of energy before going over the side of the waterfall?
a. chemical
b. kinetic
c. potential
What is c. potential
100
A book at rest on a table does not move because - a. There is no force acting on it. b. The forces acting on it are balanced. c. The forces acting on it are unbalanced.
What is b. The forces acting on it are balanced.
100
The formula for Speed
What is Speed = Distance / Time
100
What object would you NOT find on a pulley?
a. string
b. wheel
c. handle
What is c. handle
100
A fixed pulley with a mechanical advantage of 1 is used to:
A. increase work
B. decrease work
C. decrease force
D. change direction
What is D. change direction?
200
Where does a roller coaster have maximum kinetic energy?
a. at the bottom of the first hill
b. at the top of the first loop
c. at the top of the first hill
What is a. at the bottom of the first hill
200
The more mass an object has the more _________ you must exert to move it.
a. strength
b. push
c. force
What is c. force
200
A fish swims 16 meters in 8 seconds. Which of the following is the fish’s speed?
a. Speed = 16 m÷8 s = 2 m/s
b. Speed= 20 m + 8 s = 24 m
c. Speed= 16 m X 8 s = 192 m/s
What is a. Speed = 16 m÷8 s = 2 m/s
200
One type of incline plane is a..
a. ramp
b. puller
c. car
What is a. ramp
200
The speed of an object in a particular direction.
What is velocity?
(Speed and direction: 75mph South
300
Which of the following happens during an energy transformation?
a. energy disappears
b. new energy appears
c. energy changes form
What is c. energy changes form
300
The force that acts to slow the motion of things that are moving
What is friction?
300
Total distance traveled divided by total time of travel
What is average speed?
300
If you use an inclined plane with an increased length, the distance is longer, but the amount of force needed ______________.
What is decreases?
300
The type of pulley that is anchored to a structure?
What is a fixed pulley?
400
Energy of motion is called _____________. Energy that is stored is called _________________.
What is Kinetic energy?
What is Potential energy?
400
Force every object in the universe exerts on every other object in the universe
What is gravity?
400
On a distance vs. time graph, a straight line indicates a ______________ speed, and an upward curve in a line indicates _______________________.
What is constant speed?
What is acceleration?
400
What force decreases the amount of efficiency a simple machine can have?
What is friction?
400
The rate at which velocity changes.
What is acceleration?
500
Give an example of potential and kinetic energy
What is (answers vary)
500
A change in motion, a non-zero net force
What is an unbalanced force?
500
Blake gathered a toy car, a ramp, a stopwatch, a meter stick, and a variety of weights. What is he likely testing? (HINT: how do weights affect the car?)
What is how mass affects the speed of the car?
500
The type of pulley system requiring the least amount of force to raise an object? (HINT: Which pulley had higher mechanical advantage- Fixed or movable?)