Force and Motion Review

What is a force?

• a push or pull

• potential and kinetic energy

• energy that surrounds us and allows us to manipulate objects with our minds

• when an object speeds up or slows down

What is the unit of measurement for force?

• Newton

• Pounds

• Meters/second

• Joules

What is net force?

• the combination of all forces acting on an object

• the force a fish feels when you catch it

• when an object experiences a change in motion

• the combination of the forces that are all pushing in the same direction

Mr. Davidson and Mrs. Reeves were playing a game of Tug-O-War. Since Mr. Davidson took 10 weeks of weight training in high school, he was able to pull with a force of 85 Newtons to the left. However, Mrs. Reeves was able to pull with 95 Newtons of force to the right. What is the net force acting on the rope and in who will win the game?

• 10 Newtons to the right, Mrs. Reeves

• 10 Newtons to the left, Mr. Davidson

• 180 Newtons to the right, Mrs. Reeves

• 180 Newtons to the left, Mr. Davidson

• No one wins since Mr. Davidson does not believe in having fun

What is friction?

• A force when two surfaces rub against each other

• A force that pulls all objects toward each other

• A push or a pull

• A transfer of energy from one object to another

Mrs. Reeves' husband made her an office out of his fishing rod building room. He had to push a lot of boxes out of the way to make space. What type of friction did the boxes experience as they were being pushed?

• static

• sliding

• rolling

• fluid

Mr. Davidson went to Costco to load up on toilet paper. He placed 17 bags of it on his cart. However, his cart was too heavy to push. It seemed that no matter how hard he tried, the cart just did not move. What type of friction was the cart experiencing?

• static

• sliding

• rolling

• fluid

In his youth, Mr. Davidson played a game called "Can Racing". To do this, him and his friend would both sit inside a trash can at the top of a hill. Once someone yelled go, we would roll down a hill. Once we reached the bottom, the trash cans would come to a stop. What type of friction caused the cans to stop?

• static

• sliding

• rolling

• fluid

At the lake, Mr. Davidson fell out of a tree and into the water. Since he forgot to wear his water wings, he began to sink in the lake. However, he sank at a slower rate than how fast it fell. This is because he experienced what type of friction?

• static

• sliding

• rolling

• fluid

What is gravity?

• A force that pulls objects toward each other

• A force an object experiences when two objects slide past each other

• The force that makes things fall

• Terminal velocity of a falling object