Ask a New Question
Menu

A student collects data during an investigation about inertia and acceleration.

If the force acting on the objects is constant, which statement about inertia and acceleration is supported by the data?

(1 point)
Responses

An object with a higher mass has less inertia which causes it to speed up more quickly.
An object with a higher mass has less inertia which causes it to speed up more quickly.

An object with less mass has more inertia which causes it to speed up more quickly.
An object with less mass has more inertia which causes it to speed up more quickly.

An object with less mass has less inertia which causes it to speed up less quickly.
An object with less mass has less inertia which causes it to speed up less quickly.

An object with a higher mass has more inertia which causes it to speed up less quickly.
An object with a higher mass has more inertia which causes it to speed up less quickly.
Skip to navigation

11 answers

The correct statement supported by the understanding of inertia and acceleration is:

An object with a higher mass has more inertia which causes it to speed up less quickly.

This is in line with Newton's second law of motion, which states that the acceleration of an object is inversely proportional to its mass when a constant force is applied. In other words, greater mass (and thus greater inertia) results in less acceleration for the same applied force.

The picture shows a physics lab set up.

Why does the disc fall straight down into the glass when we quickly pull the index card away from the glass in a horizontal direction?

(1 point)
Responses

inertia
inertia

static friction
static friction

kinetic friction
kinetic friction

equilibrium
equilibrium
Skip to navigation

The correct response for why the disc falls straight down into the glass when the index card is quickly pulled away is:

inertia

Inertia is the tendency of an object to maintain its state of motion (or rest) when no external forces are acting on it. When the index card is pulled away quickly, the disc does not have enough time to move horizontally with it because it wants to remain in place due to its inertia. As a result, it falls straight down into the glass.

A student is riding the school bus. The bus stops as the driver applies the brakes. Which of these statements best describes this situation?(1 point)
Responses

A force is changing the motion of the bus.
A force is changing the motion of the bus.

The bus is gaining energy because of friction.
The bus is gaining energy because of friction.

The school bus does not lose or gain kinetic energy.
The school bus does not lose or gain kinetic energy.

There is no force acting on the bus so it stops moving.

The statement that best describes the situation when the bus stops as the driver applies the brakes is:

A force is changing the motion of the bus.

When the brakes are applied, a force is exerted on the bus in the opposite direction of its motion, causing it to decelerate and eventually stop.

A pitcher throws a baseball to the catcher. The ball's path begins as a straight line, and then its patch curves toward the ground. Which two forces are acting on the baseball?(1 point)
Responses

electricity and friction
electricity and friction

gravity and friction
gravity and friction

inertia and magnetism
inertia and magnetism

nuclear and inertia

The correct response for the forces acting on the baseball as it is thrown by the pitcher and then curves toward the ground is:

gravity and friction

Gravity pulls the ball downward, and air resistance (which can be considered a form of friction) acts against the motion of the ball, contributing to the curvature of its path.

Two people are in a rowboat on a river. The current of the river water carries them at a speed of five meters per second even when they are not rowing. What will happen to the boat's motion of no other forces act on the boat?(1 point)
Responses

The boat's speed will increase.
The boat's speed will increase.

The boat's speed will decrease.
The boat's speed will decrease.

The boat's speed will stay the same.
The boat's speed will stay the same.

The boat will change direction.

The correct response is:

The boat's speed will stay the same.

If no other forces act on the boat (such as additional rowing or resistance from the water), it will continue moving at the constant speed of the current, which is five meters per second. According to Newton's first law of motion, an object in motion will stay in motion at a constant velocity unless acted upon by an external force.

nertia is(1 point)
Responses

a moving object's speed and direction.
a moving object's speed and direction.

the resistance of an object to change its motion.
the resistance of an object to change its motion.

a force that acts on a resting object.
a force that acts on a resting object.

an object's motion.

The correct response is:

the resistance of an object to change its motion.

Inertia is the property of matter that causes it to resist changes in its state of motion, whether that be remaining at rest or continuing to move at a constant velocity.