Force & Motion Unit Test

Force acts on one particular object and has...

• strength and direction
• strength and balance
• balance and direction

One of the events during field day is "Tug-of-War." Mark and Henry are about the same size and pull on opposite ends of the rope. The rope moves toward Mark. Which statement is true?

• Forces are balanced
• Forces are unbalanced
• Forces are pushing and pulling

Which is an example of a balanced force?

• Two boys pushing on a box, but the box not moving.
• Two boys pushing on a box, and the box sliding across the floor.
• Two boys pushing on a box, and the box tipping over.

Two students roll two balls that are the same sizes from the same position. One ball goes further than the other. What statement is true?

• One ball is smaller.
• One ball is rougher.
• One student applied more force.
• One ball is just slower.

A student designed a test ramp using 4 books and a flat piece of wood. During the first test of the ramp, the toy car rolled down the ramp smoothly. The student then removes one book from the ramp. What will likely happen to the motion of the toy car compared to the first test?

• The toy car will move at a greater speed.
• The toy car will move at a slower speed.
• The toy car will move at the same speed.

Zoe and Ben are in a tug of war with Drew and B.J. They are pulling on opposite ends of a rope. If Zoe and Ben are pulling with a greater amount of force, which direction will the rope move?

• The rope will pull in the direction of Zoe and Ben.
• The rope will pull in the direction of Drew/BJ.
• It will move in an upward direction.

Mr. Ortez's car stopped running. He had to push it off the highway onto the side of the road as shown. What is the push most likely to change?

• The mass of the car.
• The shape of the car.
• The position of the car.
• The color of the car.

Lucy was given a horseshoe magnet like the one shown. How could she test how strong the magnet is?

• Throw her magnet in the air and see how long it stays there.
• Shine a light on the magnet and see how much light is reflected off it.
• Tap the magnet on the table and see the vibrations it makes.
• Put the magnet on a pile of paper clips and see how many the magnet picks up.

Bella places a steel paper clip, an eraser, an iron screw, and a plastic button in a large glass bowl as shown. Which two items would not stick to a magnet?

• paper clip and screw
• screw and button
• button and eraser

Examine the electromagnet. What will happen if iron comes near the electromagnet?

• The iron will be attracted to the nail.
• The iron will be attracted to the battery.
• The iron will be repelled from the nail.