Force and Motion Practice#1

After throwing a basketball through the net, Anna observed the ball as it hit the ground. Which is most likely responsible for the ball hitting the ground?

• friction

• gravity

• mass

• speed

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If the same amount of effort is applied to all four identical wagons, why would Wagon W move farthest?

• It has the least amount of mass, affecting its motion.

• It has the least amount of speed, affecting its motion.

• It has the greatest amount of gravity, affecting its motion.

• It has the greatest amount of friction, affecting its motion.

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Chris climbs onto a skateboard ramp halfway between the top and the bottom of the ramp. Because gravity acts on Chris, which is most likely to happen?

• He won’t move.

• He will roll up the ramp.

• He will roll down the ramp.

• He will float above the ramp.

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Ana is pushing a wheelbarrow of rocks. She stops and unloads half of the rocks. How will this effect the force needed to move the wheelbarrow?

• A. Gravity is increased, making the wheelbarrow easier to move.

• B. Gravity is decreased, making the wheelbarrow harder to move.

• C. Friction is increased, making the wheelbarrow harder to move.

• D. Mass is decreased, making the wheelbarrow easier to move.

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What has the greatest impact on a free-falling object?

• friction

• gravity

• inertia

• momentum

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How would the sled’s speed most likely change after Katie’s sister got into the sled?

• The speed would increase due to the change in mass.

• The speed would decrease due to the change in mass.

• The speed would increase due to the change in friction.

• The speed would decrease due to the change in gravity.

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Billy rolls a toy truck filled with marbles across the kitchen floor. He then dumps the marbles before rolling it back to his starting location. How would the speed of the truck most likely change on the way back?

• The speed would increase due to friction.

• The speed would increase due to a change in mass.

• The speed would decrease due to a change in mass.

• The speed would decrease due to a change in gravity.

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Chris attaches a sheet of sandpaper to the top of his skateboard. How does this sandpaper most likely affect Chris’s skateboarding?

• It protects the skateboard from any damage.

• It allows Chris to steer the skateboard in a variety of directions.

• It reduces the effect gravity has on the skateboard as he moves down the ramp.

• It increases friction between the skateboard and Chris’s foot to keep him from slipping.

Four cubes made of different materials are moving down a plastic slide. Which cube would experience the greatest amount of friction?

• The cube made of ice

• The cube made of sandpaper

• The cube made of smooth plastic

• The cube made of polished stone

At the bottom of which ramp would the car be traveling the fastest?

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