For an inclined plane (ramp) to make work easier, which must be TRUE of the inclined plane?

it must cover a longer distance

it must cover a shorter distance

An increase or a decrease in an object's speed means which of the following is true?

Unbalanced forces are acting on the object

A change has occurred in the object's mass

Balanced forces are acting on the object

The segment of the graph from 5 sec-10 sec shows the graphed object is doing what?

this segment tells us nothing about the object

Which of the following would cause an object at rest to begin moving?

unbalanced forces acting on the object

Which situation best explains the law of inertia(Law 1)?

Seat belts keep passengers restrained during a car wreck.

Carbon Dioxide gas pushes up on a canister lid while the canister lid pushes down on the gas, causing the alka-seltzer rocket to launch.

Tectonic plates push against each other.

A baseball player hits the ball with enough force to score a home run.

True or False: Friction does NOT affect the speed at which a car goes down a ramp

False- adding or taking away friction DOES change the speed

A roller coaster car travels up a hill until it reaches the top, slowly goes over, and speeds down the hill and through the rest of the roller coaster. At the end, the brakes quickly stop the car, and the riders appear to continue moving forward. Which of Newton's laws of motion best applies to the riders of the roller coaster?

Newton's law of action-reaction

Newton's law of force and acceleration

Why do objects that are moving in outer space keep moving?

because there is not an unbalanced force acting on them

because the forces acting on the object are balanced

A science teacher states if 2 ice skaters with the same mass push against one another with the same force, they will move away from one another at the same speed and same distance. What scientific evidence supports the teacher as correct?

Newton's law of action-reaction

Newton's law of force and acceleration

Hospitals use gasoline-powered generators during power outages to keep lifesaving equipment working. What energy transformations take place within a generator?

Chemical energy to mechanical energy to electrical energy

Chemical energy to electrical energy

Mechanical energy to chemical energy to electrical energy

Electrical energy to mechanical energy to chemical energy

Forces and Motion Science

Authored by Charles Martinez

Other Sciences

8th Grade

Used 2+ times

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29 questions

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MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which of the following formulas is used to find ACCELERATION?

Mass/Force

Force/Mass

Mass x Force

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

When 2 OPPOSING forces are acting on an object, to find acceleration you must first do this.

Determine the object's speed

Find Net force by subtracting the smaller force from greater

Determine what the object is made out of

Find Net force by adding the forces together

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

How can the work being done in this image be done with less effort?

Move the fulcrum closer to the force

Move the force to the end of the ramp

Move the fulcrum closer to the load

Move the fulcrum to the end of the ramp

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which of the following MUST be present for work to be completed?

the object moves in the direction the force is applied

an element of time

as long as there is a force being applied, work is being done

the object moves in any direction

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the best explanation as to why a pulley makes work easier?

they make the load lighter, thus easier to move

they decrease the force needed to move an object

they change the direction of the force needed to do work

they decrease the distance an object must be moved

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Without this, "work" is not being performed?

effort

force

movement

both a force and movement

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

True or False: An object's mass has NO AFFECT on the object's rate of acceleration.

True- mass does NOT affect acceleration rate

False- Smaller the mass= Faster the acceleration rate

False- Greater the mass= Faster the acceleration rate

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Forces and Motion Science

Which of the following formulas is used to find ACCELERATION?

When 2 OPPOSING forces are acting on an object, to find acceleration you must first do this.

How can the work being done in this image be done with less effort?

Which of the following MUST be present for work to be completed?

What is the best explanation as to why a pulley makes work easier?

Without this, "work" is not being performed?

True or False: An object's mass has NO AFFECT on the object's rate of acceleration.

For an inclined plane (ramp) to make work easier, which must be TRUE of the inclined plane?

At what point is there the greatest amount of kinetic energy? *pendulum swinging from point A to point D

True or False: A curved line on a Position vs Time graph indicates a constant speed

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