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What is force?
A push or a pull of an object.
What is the type of force that pulls objects toward the Earth?
What do we call the speed and direction of a moving object?
Velocity.
What unit do we measure force with?
Newtons.
Which force keeps a baseball from rolling quickly on the carpet?
a. Magnetism
b. Gravity
c. Friction
d. Mass
c. Friction
If speed = distance/time, then what is the speed of an object that moves 60 meters in 12 seconds? You must include the unit.
5 meters/second.
Payton has a wagon filled with rocks. Which most likely happens when Payton empties the rocks from his wagon?
A. an increase in the force needed to move the truck
B. a decrease in the force needed to move the truck
C. an increase in friction will act on the truck
D. an increase in gravity will act on the truck
B. a decrease in the force needed to move the truck
Layla had a toy truck weighing 15 grams and a toy car weighing 6 grams. Using the same amount of force on each toy, she pushed them both across his desk. The car reached the other side of the desk in 1.5 seconds, but it took the truck 3.5 seconds to reach the the other side of the desk. Why did the car travel the same distance in a shorter amount of time?
A. The car had less mass and traveled at a faster speed than the truck.
B. The car had more mass and traveled at a faster speed than the truck.
C. The truck had more mass and traveled at a faster speed than the car.
A. The car had less mass and traveled at a faster speed than the truck.
How do we calculate speed?
Which object would require the least amount of force to move?
a. Feather
b. Cort
c. A cat
d. A truck
a. Feather
Which will happen to an object if the forces acting upon it are unbalanced?
A. The object will remain still and not move.
B. The object will move equally in both directions.
C. The object will move based on the weaker force.
D. The object will move based on the stronger force.
D. The object will move based on the stronger force.
Which will happen to an object if the forces acting upon it are balanced?
A. The object will remain still and not move.
B. The object will move equally in both directions.
C. The object will move based on the weaker force.
D. The object will move based on the stronger force.
A. The object will remain still and not move.
What happens to the speed of an object when the position does not change over a period of time?
A. speed increases
B. speed decreases
C. speed remains zero
D. speed changes constantly
C. speed remains zero
Nicole jumped as high as she could. She tried again holding a bowling ball. How would her jumping height change as a result of Nicole holding the bowling ball?
A. The height would increase due to the change in mass.
B. The height would decrease due to the change in mass.
C. The height would increase due to the change in friction.
D. The height would decrease due to the change in gravity.
B. The height would decrease due to the change in mass.
What law of motion is this?
An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.
Newton's first law of motion.
What law of motion is this?
The greater the mass of an object, the more force it will take to accelerate the object.
Newton's second law of motion.
What law of motion is this? (think of the rocket ship)
For every ACTION there is an EQUAL and OPPOSITE REACTION
Newtons third law of motion.
What is the formula for calculating force?
f=ma (force = mass x acceleration)
What is friction?
The force that slows down an object that is rubbing on a surface
If speed = distance/time...
An object moves a distance of 20 meters in 10 seconds. What is the average speed of the object?
A. 0.5 m/s
B. 2 m/s
C. 10 m/s
D. 20 m/s
B. 2 m/s