physical science / force

Force is a ________________________________.

• change in position

• push or a pull

• two surfaces rubbing against each other

• a pull toward the center of the Earth

A force that acts when two surfaces rub together

• force

• fiction

• fraction

• friction

Tug of war contest: A boy and a dog are pulling both ends of a rope. The dog wins! Why? Click all that apply.

• The dog has more force.

• The dog has less force.

• The boy has more force.

• The boy has less force.

• Force Q is equal to Force S and Force R is equal to Force T.

• Force Q is less than Force S and Force R is equal to Force T.

• Force Q is equal to Force S and Force R is greater than Force T.

• Force Q is less than Force S and Force R is greater than Force T.

In which direction will the box move?

• A. in the direction arrow P is pointing

• B. in the direction arrow Q is pointing

• C. in the direction arrow R is pointing

• D. in the direction arrow S is pointing

Which term is an example of force?

• weight

• energy

• work

• mass

What happens to Box X and Box Y as a result of the forces?

• A. Box X starts moving, speeding up, and Box Y remains at rest.

• B. Box X starts moving at constant speed, and Box Y remains at rest.

• C. Box X starts moving at constant speed, and Box Y starts moving, speeding up.

• D. Box X starts moving, speeding up, and Box Y starts moving at a constant speed.

An object moves at a constant speed.

What will happen to this object’s motion over time if no new forces are applied?

• It will change direction.

  
  

• It will increase in speed.

• It will decrease in speed.

• It will maintain a constant speed.

What is the net force shown in the image?

• 25 Newtons

• 5 Newtons Left

• 5 Newtons Right

• 15 Newtons Left

Which diagram shows an object with balanced forces?

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