Javier made a list about balanced and unbalanced forces.
Balanced Forces Unbalanced Forces
can cause an object to speed up, slow down, or change directions
cause objects to stay in the same place or to continue moving at the same speed
Javier made a mistake on his list. Which best describes the mistake Javier made?
A.
Javier forgot to add that forces can never change.
B.
Balanced forces only cause objects to change directions.
C.
Unbalanced forces only cause objects to stay in the same place.
D.
Javier switched the descriptions for unbalanced and balanced forces.
what is the correct option?
D. Javier switched the descriptions for unbalanced and balanced forces.
The picture shows a physics lab set up.
When the index card is quickly pulled away from the glass in a horizontal direction, why does the disk fall straight down into the glass?
A.
equilibrium
B.
static friction
C.
kinetic friction
D.
inertia
what is the correct option?
D. inertia
A student is investigating mass and acceleration. The student applies the same force to two boxes, as shown in the table.
Box Force Applied to Box (newtons) Acceleration (meters/second2)
1 20 5
2 20 2
The student claims that box 1 must have a smaller mass than box 2. Which argument best supports the student's claim?
A.
Heavier objects require less force than lighter objects to accelerate at the same rate.
B.
Heavier objects require greater force than lighter objects to accelerate at the same rate.
C.
Lighter objects require less force than heavier objects to start moving but will accelerate at the same rate.
D.
Lighter objects require greater force than heavier objects to start moving but will accelerate at the same rate.
what is the correct option?