Vocabulary
A push or pull on an object?
Force
Which force pulls you down a playground slide?
Gravity
True or False. Using snow tires on an icy road is an example of increasing friction.
True
Jaxon is playing with a soccer ball at the top of a hill. Jaxon kicks the ball and it rolls down the hill. What happens as the ball rolls?
The force of gravity pulls the ball downhill.
Micera and Madison were moving a bookshelf across the carpet in their classroom. Even though they pushed as hard as they could, the bookshelf would only move a few inches at a time. What happened as they tried to push the bookshelf?
The force of friction opposed the motion of the bookshelf.
A change in an object's position?
Motion
The force when 2 objects rub against one another.
Friction
Explain why a parachute makes a person falling from a great height fall more slowly?
The parachute causes air resistance, which slows the fall.
Fraser started pushing a bookcase across the room. Then, she removed the books and continued pushing with the same force and direction. How does removing the books affect the motion of the bookcase?
The mass is decreased, making the bookcase move faster.
A rolling ball will slow down until it finally stops. What force slows down and stops the ball?
Friction
A measure of how far an object moves in a certain amount of time? (Distance divided by time)
Speed
Which force results in a movement?
A balanced or unbalanced force?
Unbalanced force
Explain why a person standing on the Moon can jump higher than a person standing on Earth.
The Moon's gravitational pull is less than Earth's.
Jennifer kicked the winning goal in her last soccer game. What force acted between Jennifer's foot and the ball to cause the ball to move?
Push
Some students apply force to a toy car on a ramp to push it down. The students measure how fast the car rolls down the ramp. If students want to increase the speed of the car down the ramp, what should they do?
Increase the force applied to the car.
Anything that has mass and takes up space?
Matter
Ms. Singla's class and Mrs. Hester's class are playing tug-of-war. After several minutes, the students notice that the rope has not moved at all. What is one possible cause of this?
The two classes have created a balanced force on the rope.
A toy car rolling along different surfaces will experience different amounts of friction. A toy car would encounter the most friction when rolling on which surface?
A rough surface (for example: a sandy beach, over grass, over rocks)
Rodrigo and Alec are moving a dresser. They are arguing about which direction to move it. Rodrigo is pushing the dresser with a force of 5 newtons towards Alec. Alec is pushing the dresser towards Rodrigo with a force of 10 newtons. What happens to the dresser?
The dresser moves towards Rodrigo.
What is the speed of an object if it travels 500 miles in 2 hours?
250 mph
A force that pulls objects toward each other.
Gravity
What two forces are acting together to keep a cup balanced on a table?
Gravity and the force of the table holding the cup up.
A car and a truck travel at the same speed on a road in the same direction. Both vehicles slow down with the same stopping force. Why does the truck need more distance the the car to stop?
The truck has more mass.
Which type of force does not change an object's motion?
An unbalanced Force
Xamara roller skates to the top of a hill and then starts rolling downward. What are the MAIN forces affecting Xamara’s motion as she rolls down the hill?
Friction and Gravity