Science Concepts. The student knows that forces cause change. The student is expected to: (A) measure and record changes in the position and direction of the motion of an object to which a force such as a push or pull has been applied.

What is a push and pull?? Push is a force that causes motion away from the source. "He pushed the table into a corner" A pull is an attractive force, which causes motion towards the source of the motion. “Pull your knees towards your chin."

A student hits a tennis ball with her racket during a tennis game A student hits a tennis ball with her racket during a tennis game. Using the picture above, which direction will the tennis ball most likely go? A. B. C. D.

The correct answer is…B!!! B is the correct answer because the direction of the racket’s force is pushing the ball in an upward motion.

Incorrect Choices: A would be incorrect because the force of the racket is not pushing the tennis ball straight down. C and D would be incorrect because it would be impossible for the tennis ball to go the opposite direction of the force applied.

During recess, two teams are playing Tug-of-War During recess, two teams are playing Tug-of-War. Each team is pulling with equal force. What will happen? The team on the right will win. The team on the left will win. The two teams will stay in the same place. The rope will become loose in the middle.

The correct answer is… C! Since both teams are pulling with equal force, both teams will stay in the same place. There would be no distance moved on either side of the rope.

Incorrect Choices: A would be incorrect because the team at the right is not pulling with a greater force. B would be incorrect because the team at the left is not pulling with a greater force. D would be incorrect. Since both teams are pulling on the rope, there would be no slack in the center of the rope. It would be tight.

The pool player is getting ready to use the pool stick to hit the white ball into the yellow ball straight on while using great force. What will happen to the yellow ball? The yellow ball will stay still. The yellow ball will move in the same direction as the white ball. C. The yellow ball will move toward the red ball. The yellow ball will move in a straight upwards motion and hit the ceiling.

The correct answer is B!!! B is the correct answer because the pool stick is pushing the white ball into the yellow ball with the same applied force and direction.

Incorrect Choices: A would be incorrect because there is an applied force hitting the yellow ball. The yellow ball would have to move. C would be incorrect because the direction the force is being applied is going in the opposite direction of the red ball. D would be incorrect because the applied force is not coming from directly underneath the yellow ball, but from the side.

A rock climber must have a strong upper body to climb a mountain A rock climber must have a strong upper body to climb a mountain. What type of force is helping the rock climber climb up the rope? Pull Push Gravity Magnetic

The correct answer is…A!!! A is the correct answer because the rock climber must pull himself up the rope to help him climb up the mountain.

Incorrect Choices: B would be incorrect because pushing would cause the rock climber to climb down or away from the mountain, not up the mountain. C would be incorrect because the rock climber is climbing up against gravity. Gravity would only make the climbing more difficult. D would be incorrect because the rope is not magnetic, nor his hands.