Forces and motion

Which pair of actions both use a pulling motion?

• typing on a keyboard and removing a bow from a gift

• patting a friend on the back and wind knocking over an old tree

• a truck towing a card and a child dragging a backpack full of books

• all of the above

Which statement about force and motion is true?

• For every force, there is motion

• For every motion, there is force

• Force and motion have the same meaning

• People and nature produce forces, while machines produce motion.

What will an object do if it has enertia

• It will stay at rest until force acts upon it.

• it will keep moving until a force acts upon it.

• It will keep moving or stay at rest forever.

• It will keep moving or stay at rest until a forces acts upon it.

What are Newton's law of motion?

• rules that people must follow when driving a car.

• rules that describe how energy moves from one object to another.

• rules that describe how all objects move

• rules that explain how energy changes one kind to another.

What will most likely happen if you push harder while asking in a straight line?

• You will turn.

• You will stop.

• You will go slower

• You will go faster.

Complete the sentence describing Newton's third law of motion. For every action in one direction.

• a weaker force acts in the same direction.

• an equal force acts in opposite direction.

• a stronger force acts in the opposite direction.

• an equal force acts in the same direction.

Grass uses energy from the Sun to grow. A cow eats grass so it has energy to walk. You drink milk from the cow so you have energy to hit a ball. This makes a loud sound and sends the ball flying. In these steps energy keeps moving and changing. What is this series of steps called?

• energy movement

• energy switching

• energy transfer

• energy conversion

Which task would require the most work?

• carrying 1 kilogram (2.2 lb.) bucket of water 3 meters (10 ft.)

• carrying a 5 kilogram (11 lb.) bucket of water 7 meters (23 ft)

• carrying a 1 kilogram (2.2 lb) bucket of water 7 meters (23 ft)

• carrying a 5 kilogram (11 lb) bucket of water 3 meters (10 ft)

If you pull a rubber band back but don't release it, what kind of energy does the rubber band have?

• kinetic energy

• potential energy

• wasted energy

• motion energy

Rubbing your hands together is an example of sliding friction, while a paper plane flying through the air is an example of_________.

• fluid friction

• rolling friction

• solid friction

• heating friction