I. Forces and Motion

Suppose that you are in the car with a dog. The car is moving in relation to the landscape. What might be your reference(s) point(s), other than yourself, if you determine that the dog is not moving.

• the car itself

• yourself

• another person in the car

• an object in the car

Answer explanation

However the dog is moving in relation to the landscape, it is not moving in relation to the car.

In Science, "relative" means:

• not fixed

• someone in my family

• someone I am related to

• not absolute

Answer explanation

The explanations "someone in my family" and "someone I am related to" refer to the word relative when it is used as a noun.

Choose the source of information that you might use to determine the relative motion of Earth compared to other planets in the solar system,

• online information about the speeds and locations of all the planets

• Britannica encyclopedia of 1950

• my cousin

What are some examples of forces?

• gravity

• magnetic force

• friction

• environment

• pushing and pulling

What does it mean to say that force acts on an object?

It means that the object is being ______ or ______.

(a)  

If one person pushes to the left on a big rock.

What are two ways a friend can apply a push or pull to help him?

• Push the rock to the left, from the right side of the rock.

• Pull the rock from the right.

• Push the rock to the right, from the side of the rock.

• Pull the rock from the left.

Suppose a person runs at a constant speed. To find out what this speed is, you measure the distance the person travels and ______ that number by the amount of ______it takes for the person to run that ______.

• time / distance / divide

• time / divide / time

• divide / time / distance

• distance / time / divide

Order these situations from least gravity to greatest gravity between two objects.

• 1 light item and 1 heavy item a medium distance apart

  2 heavy objects close together

  2 light objects far apart

• 2 light objects far apart

  2 heavy objects close together

  1 light item and 1 heavy item a medium distance apart

• 2 light objects far apart

  1 light item and 1 heavy item a medium distance apart

  2 heavy objects close together

A tow truck pulls on two cars with equal force. The car with ________ mass is easier to pull.

• less

• more

• equal

A girl pushes on two stacks of books with equal force. The stack with greater mass will change speed more ____________ compared to the stack with less mass.

• slowly

• rapidly