Motion & Speed
Which formula gives average speed?
A) Distance × Time
B) Time ÷ Distance
C) Distance ÷ Time
D) Distance + Time
C) Distance ÷ Time.
What does Newton’s 1st Law say?
A) Forces do not affect motion.
B) Balanced forces keep velocity the same; unbalanced forces cause acceleration.
C) All objects fall at the same speed.
D) Force equals mass squared.
B) Balanced forces keep velocity the same; unbalanced forces cause acceleration.
Magnetism & Experiments 100 — (Multiple choice) Which two items were listed as magnetic in the notebook?
A) Steel nail and paper clip
B) Paper clip and aluminum foil
C) Rubber band and golf tee
D) Copper wire and aluminum spoon
A) Steel nail and paper clip.
A ball rolls 12 meters in 3 seconds. What is its average speed in meters per second?
12 ÷ 3 = 4 m/s
If two equal forces push on opposite sides of a box, what is the net force and what happens to the box?
Net force = 0; the box does not change motion
Identify the independent and dependent variables for the Weight vs. Mass graph.
Independent = Mass (g) ; Dependent = Weight (N).
In investigation EFM 2.1, if the first half measured 1 m in 0.56 s and the second half measured 1 m in 0.65 s. Which half had the greater average speed?
First half (1 ÷ 0.56 is less time than 1 ÷ 0.65); first half had greater speed because it took less time for the same distance.
An object is experiencing unbalanced forces with 2 N left and 5 N right, which direction does the object accelerate?
Right
When mass increases what happens weight?
Weight also increases
Describe acceleration in one short sentence.
Acceleration is a change in speed or direction.
What equation represents Newton's 2nd Law?
Acceleration = Net Force / Mass
Which sentence correctly states the difference between mass and weight?
A) Mass is how heavy something feels; weight is how big it is.
B) Mass is the amount of matter; weight is the pull of gravity on that matter.
C) Mass and weight are exactly the same.
D) Mass measures speed; weight measures force.
B) Mass is the amount of matter; weight is the pull of gravity on that matter.
Which trial has the higher average speed?
Trial 1: Object travels 12 cm in 2 s
Trial 2: object travels 22 cm in 2 s.
Trial 2 is faster
A toy cart accelerates at 3 m/s² when pushed with 12 N. Using simple division with whole numbers, what is the cart's mass in kilograms? (Hint: think "how many times does 3 go into 12?")
12 ÷ 3 = 4 kg
Write one clear sentence conclusion from the Number of Magnets vs. Number of Washers data.
As the number of magnets increases, the number of washers held also increases.