Question

Which of the following always causes an object to change its velocity? (1 point)
Responses

If more forces began to act on an object
If more forces began to act on an object

If the forces on an object became unbalanced
If the forces on an object became unbalanced

If fewer forces began to act on an object
If fewer forces began to act on an object

If the forces acting on an object are equal in magnitude and opposite in direction
If the forces acting on an object are equal in magnitude and opposite in direction
Remaining Attempts : 3

Answer 1

The acceleration of a model rocket is measured when using different motors with the same mass. Each motor provides a different amount of force to the rocket. If the data are graphed as acceleration versus force, what is the expected shape of the graph? (1 point)
Responses

a flat line, where the y-intercept equals mass
a flat line, where the y -intercept equals mass

a sloped line, where the slope is 1/mass
a sloped line, where the slope is 1/mass

a flat line, where the y-intercept equals 1/mass
a flat line, where the y -intercept equals 1/mass

a sloped line, where the slope equals mass

Answer 2

Use the simulation to answer the question.

Force and Motion Basics (select Acceleration)

What is the relationship between mass and acceleration for a given nonzero net applied force?

(1 point)
Responses

As mass increases, the acceleration increases, because mass and acceleration are inversely proportional.
As mass increases, the acceleration increases, because mass and acceleration are inversely proportional.

As mass increases, the acceleration decreases, because mass and acceleration are directly proportional.
As mass increases, the acceleration decreases, because mass and acceleration are directly proportional.

As mass increases, the acceleration increases, because mass and acceleration are directly proportional.
As mass increases, the acceleration increases, because mass and acceleration are directly proportional.

As mass increases, the acceleration dec

Answer 3

What information must be shown for every force in a force diagram in order to determine if the forces are balanced?(1 point)
Responses

the net force
the net force

the acceleration and force of the object before the contact
the acceleration and force of the object before the contact

the surface area of the object the force comes in contact with
the surface area of the object the force comes in contact with

the magnitude of the force in Newtons and the direction

Answer 4

The correct response is:

**If the forces on an object became unbalanced.**

Unbalanced forces result in a net force that changes the object's velocity, which can result in acceleration (speeding up, slowing down, or changing direction).

Answer 5

The expected shape of the graph of acceleration versus force for a model rocket (given that acceleration is directly proportional to force according to Newton's second law, \( F = ma \)) would be:

**a sloped line, where the slope is 1/mass.**

In this relationship, acceleration (a) is plotted on the y-axis and force (F) on the x-axis, the slope of the line represents \(\frac{1}{m}\) (where m is mass), signifying that as force increases, acceleration increases proportionally.

Answer 6

The correct response based on the relationship defined by Newton's second law (\(F = ma\)) is:

**As mass increases, the acceleration decreases, because mass and acceleration are inversely proportional.**

When a constant net force is applied, increasing mass leads to a decrease in acceleration, reflecting the inverse relationship between mass and acceleration.

Answer 7

The correct response is:

**the magnitude of the force in Newtons and the direction.**

To determine if forces are balanced, you need to know both the magnitude and the direction of each force acting on the object. Balanced forces occur when the net force equals zero, which happens when the forces are equal in magnitude and opposite in direction.