Unit 5 Lessons 1+2: Forces in Motion

truss bridge

• a bridge with triangular supports

• a bridge with circular supports

• a bridge made of wood

• a bridge that is always straight

unbalanced force

• two forces that push and pull in opposite directions where one force is greater than the other so that the object moves

• two equal forces acting in the same direction causing no movement

• a single force acting on an object causing it to accelerate

• forces that are balanced and result in no change in motion

pillar bridge

• a bridge that is supported by thick poles

• a bridge that is built on water

• a bridge made of glass

• a bridge that is only for pedestrians

balanced force

• two forces that push and pull in opposite directions so that the object doesn't move

• a single force acting on an object causing it to accelerate

• forces that are unequal and cause an object to move

• forces that act in the same direction and increase the object's speed

push

• to move an object away from you

• to pull an object closer to you

• to lift an object upwards

• to throw an object downwards

design

• to create a visual representation of something

• to make a plan for creating or doing something

• to evaluate the effectiveness of a product

• to analyze data for decision making

suspension bridge

• A bridge where the weight is supported by arches.

• A bridge where the weight is pulled up by the ropes hung from tall poles.

• A bridge that uses cables to support the deck.

• A bridge that is built on pillars above water.

force

• a push or a pull

• a type of energy

• a measure of mass

• a change in velocity

model

• a pretend version of something that scientists use when the real is too big or too small

• a physical representation of a scientific theory

• a detailed explanation of a scientific phenomenon

• a collection of data points used for analysis

pull

• to move an object towards you

• to push an object away from you

• to lift an object upwards

• to throw an object downwards