Force and Motion Review

A worker is constructing playground equipment for the park and dropped a box of nails and bolts. How will a magnet be helpful to the builder?

• Gravity will cause the magnet to pick up the nails and bolts.

• Friction will cause the magnet to push away the nails and bolts.

• The magnet will push the nails and bolts away from it.

• The magnet will pull the nails and bolts toward it.

A man is kayaking in a river for a fun day of fishing. How does using the paddle affect the motion of the boat?

• Pulling the paddle causes the boat to move in the opposite direction of the pull.

• Pulling the paddle causes the boat to move in the same direction of the pull.

• Gravity causes the boat to move when the paddle is lowered down into the water.

• The friction between the paddle and water cause the boat to move forward.

Which force most likely causes the skateboarder to skate down the half-pipe ramp over and over again?

• Magnetism

• Gravity

• Friction

• Pushing

When riding a bicycle, which force most likely causes the bicycle to move forward?

• Gravity pulling the bike down to the ground

• Magnetism between the wheels and pedals

• Pushing the pedals

• Pulling the pedals

Which force most likely explains why skates roll differently on surfaces such as wood, cement, rubber, or carpet?

• Magnetism

• Gravity

• Pulling

• Friction

Which forces most likely helps players score points in a basketball game?

• Friction

• Pulling

• Magnetism

• Gravity

Which force keeps the letters, words, and pictures from falling off the refrigerator?

• Friction

• Magnetism

• Gravity

• Pulling

A student wants to test the force of magnetism by placing objects on top of a piece of cardboard and then moving them with a magnet placed under the cardboard. Which items will help the student with this investigation?

• A paper clip, a thumbtack, and a toothpick

• A paper clip, a penny, and iron filings

• A piece of foil, iron filings, and a nail

• A nail, a paper clip, and a thumbtack

A Scout Troop wanted to test the effects of friction on moving toy cars. Using the same toy car in every trail, they slid it across sand paper, tile carpet, and grass. Which tools were most likely used in their investigation?

• Spring scales and hand lenses

• Meter sticks and microscopes

• Timing devices and meter sticks

• Thermometers and timing devices