Mrs. Cohen rolled a marble across the floor to Ms. Cicchino. What force started the ball rolling? (balanced force, unbalanced force, gravity, friction)
What is an unbalanced force?
When performing an investigation, it is best to do it how many times?
What is at least 3 times?
The measure of the pull of gravity on an object.
What is weight?
Give three ways you could cause a rolling marble to take a longer time to travel from one end of a table to another.
What is friction, lower ramp, obstacles such as clay or blocks, etc.?
Bev thinks that a bowling ball will fall faster to the ground than the volleyball. Jack thinks that they will hit the ground at the same time. What is the best plan for Bev and Jack to test their ideas? a. Measure the mass of a variety of balls to determine which ball will hit the ground first because it has more mass and heavier objects fall faster than lighter objects. b. Roll the bowling ball and the volleyball off a desk or table and see which one hits the ground first. c. Drop the bowling ball and the volleyball off a desk or table and see which one hits the ground first. d. Measure the circumference of the bowling ball and the volleyball to determine which will hit the ground first.
What is (c.) Drop the bowling ball and the volleyball off a desk or table and see which one hits the ground first.?
a push or a pull that does not touch an object to change motion.
What is a non-contact force?
Newton's First Law of Motion states that moving objects will move forever, and resting objects will rest forever, unless some outside forces acts on them. Choose the BEST observation that supports Newton's First Law. a. A ball that is not moving will remain still unless an outside force, such as a kick or push, acts on it to make it move. b. A tennis ball when thrown into the air will bounce 14 times before it rests. c. Friction is a force that changes the speed and direction of motion. d. Gravity is a force that pulls objects toward Earth.
What is (a.)?
List three non-contact forces that can cause objects to move.
What is (something like) gravity, magnetic field, electric field?
Mrs. Cohen's 6th grade class and 7th grade class challenged each other to a game of tug-of-war. Each class grabbed onto different ends of the long rope. Mrs. Cohen blew a whistle and both teams began to pull and pull. Neither team could pull the other team over. Give a statement about the forces involved in the tug-of-war between the two classrooms. "The forces were ___________ because _______________."
What is (something like) "the forces were balanced because the teams could not pull each other over"?
Billy and Bob were testing the flight of paper airplanes as they tossed them across the school gym. The airplanes flew across the gym and then came to a rest on the floor. Name at least one force that caused the planes to stop on the floor......
What is gravity or friction?
You can describe an object sitting at rest on the ground as follows: The ______ of the object on the ground is _________ with the ________ of the ground on the object.
What is force, balanced, and force?