Force & Motion
Which object is NOT in motion?
A. A rolling basketball
B. A parked school bus
C. A flying butterfly
D. A running dog
B. A parked school bus.
Two runners race for 10 seconds. Runner A travels 30 meters. Runner B travels 50 meters. Which runner was faster?
Runner B.
A scooter is traveling straight and then turns right at a corner. What changed about its motion?
Its direction changed.
A student pushes a toy car across a table. What caused the car to begin moving?
A. A change in color
B. A force
C. Its mass
D. Its shape
B. A force.
Two toy cars each travel 40 meters. Car A takes 8 seconds. Car B takes 12 seconds. Which car was faster? Explain.
Car A.
A marble rolls forward, bumps into a block, and rolls backward. Which characteristic of its motion definitely changed?
A. Mass
B. Color
C. Direction
D. Shape
C. Direction.
Which TWO measurements do scientists need to determine an object's speed?
A. Mass and distance
B. Height and time
C. Distance and time
D. Shape and distance
C. Distance and time.
Four animals move for 15 seconds.
Rabbit: 45 m
Dog: 60 m
Turtle: 10 m
Cat: 50 m Which animal was second fastest?
The cat.
A race car travels around a curved track. Which observation is the BEST evidence that its direction changed?
A. Its engine gets louder
B. It follows a curve
C. It passes another car
D. It travels for 20 seconds
B. It follows a curve.
A student wants to determine which of two toy trucks is faster. Which investigation would provide the BEST evidence?
A. Compare their sizes
B. Measure how far each travels in 5 seconds
C. Count their wheels
D. Compare their masses
B. Measure how far each travels in 5 seconds.
Three students ride scooters for 20 seconds. Ava travels 80 meters. Ben travels 80 meters. Carlos travels 60 meters. Which statement is correct?
A. Ava is fastest
B. Ben is fastest
C. Ava and Ben have the same average speed
D. Carlos is fastest
C. Ava and Ben have the same average speed.
A student says, 'Every moving object must eventually turn.' Which example BEST shows that the claim is incorrect?
A. A bike rounds a corner
B. A ball rolls around a circular track
C. A train moves along a straight track
D. A car turns into a driveway
C. A train moves along a straight track.
A skateboard is rolling down a hill. A student claims its speed, position, and mass must all change. Which part of the claim is incorrect, and why?
The mass does not have to change.
A student says, 'If two objects travel the same distance, they must have the same speed.' Two boats each travel 100 meters. Boat A takes 20 seconds, and Boat B takes 40 seconds. Is the student's claim correct? Use evidence.
No. Boat A was faster.
A drone flies north, turns east, and begins moving faster. Which two characteristics of its motion changed?
Its direction and speed changed.