Vocabulary
What is an increase in motion?
Acceleration
Which force pulls you down a playground slide?
Gravity
What 5 ways can a force act on an object?
Make it start to move, slow it down, speed it up, change direction, make it stop
Alix is playing with a soccer ball at the top of a hill. Alix kicks the ball and it rolls down the hill. What happens as the ball rolls?
The force of gravity pulls the ball downhill.
Joshua and Shanice 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.
Mike lifted a heavy box. What force did he have to overcome to move the box upward?
Gravity
The force that works against movement.
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.
Sandy 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?
What is friction.
What is the name of a unit of force?
Newton
What would experience the least amount of gravitational force, a pencil or a book?
A pencil
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.
Charlene kicked the winning goal in her last soccer game. What force acted between Charlene'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.
Which would travel farther down the field, a tennis ball or a basketball? Why?
A tennis ball because of less mass.
Ms. Starling's class and Ms. Howard'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 type of surface?
A rough surface (for example: a sandy beach, over grass, over rocks)
Rodrigo and Marcus 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 Marcus. Marcus is pushing the dresser towards Rodrigo with a force of 10 newtons. What happens to the dresser?
The dresser moves towards Rodrigo.
While on a camping trip, Amy and Abigail are traveling in a boat on a river. On their trip, the river's current carries them down the river at a speed of 5 meters per second (m/s). They don't need to row because the current is carrying them in the direction they need to go. If no other forces are acting on the boat, describe the motion of the boat as it travels downstream?
It stays the same.
This is a force between two surfaces rubbing against each other. It works against the motion of an object.
What is friction.
What is the formula to find the speed of an object?
Speed = Distance divided by Time
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 moves an object toward the source of the force?
Pull
Kevin roller skates to the top of a hill and then starts rolling downward. What are the two MAIN forces affecting Kevin's motion as she rolls down the hill?
What are friction and gravity.