Vocabulary
A push or pull on an object
What is force?
The tendency of an object to resist any change in motion.
What is inertia?
Mrs. Wical rolled a marble across the floor to Mrs. Culbertson. What force started the ball rolling? (balanced force, unbalanced force, gravity, friction)
What is an unbalanced force?
Which of the following is an example of balanced forces? A. Sitting on a chair B. Kicking a soccer ball C. An apple falling onto the ground D. A rocket taking off
What is A - Sitting on a chair
1. Students set up an experiment with different small objects and a tabletop covered in ice so that the friction is not a factor. The students give each object a short push to start it moving across the top of the table and record the resulting speed of each object.Which two factors have the greatest effect on the speed of the objects?
What is the force of the push and mass of the object.
The force that results when two materials rub against each other or when their contact prevents sliding.
What is friction?
Which will experience less acceleration when the same force is applied, a 100lb object or a 25lb object?
What is an 100lb object?
This is the force that acts on a space shuttle as it accelerates toward Earth.
What is gravity?
Which of the following forces slows objects down?
A. Friction B. Gravitational C. Magnetic D. Unbalanced
What is Friction
Jeremy pulls on the handle of a wagon containing 50 kilograms of gardening soil, but the wagon does not move. Which of the following actions would be most likely to start the wagon in motion?
What is increase the amount of force on the handle
A force that requires two pieces of matter to touch
What is contact force?
Which will experience more acceleration when the same force is applied, a 10kg object or a 5kg object?
What is the 5kg object?
What is push and pull?
Stefan pushes a cart with three books so it just reaches the end of a track. He puts six books onto the cart. What must he use next time so the cart reaches the end of the track?
What is more force
A car traveling down a road approaches a red light. The driver pushes the car's brakes and the car slows to a stop. What causes the car's speed to change?
What is an increase in friction
Any change in the speed or direction of an object's motion.
What is acceleration?
What is needed to give a boulder acceleration?
A large force that changes the boulders speed/direction.
Jackson was investigating the use of magnets to move objects. He observed that some objects moved toward the magnets without having to touch them. Jackson's observation can be described by saying that the magnets have what type of force?
What is non-contact force?
Which surface would probably offer the least friction if you were to slide a box across it? Glass or Wood?
What is glass?
A delivery truck makes a trip from Akron to Columbus. The truck departs from Akron at 4:00 P.M. and arrives at Columbus at 6:00 P.M. The truck travels a distance of 120 miles. What is the average speed of the truck during the entire journey?
What is 60 miles per hour
Forces that cancel each other out because they are equal in size and opposite in direction.
What is balanced force?
Fill in the blank: For ______ to occur on this object, a force must act upon it.
What is motion
Mrs. Wical's class and Mrs. Whiteman's class challenged each other to a game of tug-of-war. Each class grabbed onto different ends of the long rope. Mrs. Wical 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 5th grade classrooms. "The forces were ___________ because _______________."
What is (something like) "the forces were balanced because the teams could not pull each other over"?
Keesha designs an experiment to test the effect of force on the motion of a ball. She uses a rubber band wrapped around the legs of a chair to launch the ball. She discovers that the farther she pulls back with the rubber band, the faster the ball travels. Which conclusion should she draw?
What is increasing the force applied to a moving object will increase its speed.
Two things a student must measure to find the speed of a moving bicycle
What is distance and time?