Big Idea 13 Review

Big Idea 13 Review

Force & Motion

Multiple Choice

Mrs. Francisco and Ms. Carter are traveling to the mountains for Thanksgiving. Their car is traveling north at a steady speed of 65 miles per hour. If no other forces are acting on the car, how can you describe the motion of the car as it travels?

• The car is speeding up. The forces are unbalanced.

• The car stays the same. The forces are balanced.

• The car is slowing down. The forces are unbalanced.

• The car is changing directions. The car is unbalanced.

Multiple Choice

Two classes are playing tug of war at recess. During this game, the middle of the rope is not moving. What is happening during this tug of war game?

• Both classes are applying equal forces in the same direction.

• Both classes are applying equal forces in different directions.

• The blue class is applying more force in one direction.

• The forces are unbalanced.

Multiple Choice

Ashley is playing catch with her aunt outside. She throws the ball to her aunt and it travels about twenty feet before it falls to the ground. Why does the ball eventually fall to the ground?

• The ball ran out of air.

• There are no other forces strong enough to oppose gravity pulling the ball down.

• The ball was attracted to the magnetic force of the grass.

• There is no more air resistance to keep it in the air.

Opposition of Gravity

To overcome the force of gravity, a force must be applied that is greater than gravity’s downward pull.

Multiple Select

Select all examples that produce enough force to overcome Earth’s gravity.

• Little girl sitting in a chair

• Kicking a soccer ball

• Rocket boosters sending a shuttle into space.

• Parachute

Multiple Select

Select all that will be attracted to the south pole of a bar magnet.

• aluminum foil

• iron nail

• The south pole of another bar magnet.

• The north pole of another bar magnet.

Fill in the Blank

If you try to touch the north and south ends of two magnets together, they will _____.

Multiple Choice

Ron and Paul are moving trying to move a box. Ron is moving it with 15 N of force towards Paul. Paul is moving the box with 10 N of force towards Ron. What will happen to the box?

• The box will move back and forth between both men.

• The box will move towards Ron.

• The box will move towards Paul.

• The box will not move at all.

Multiple Choice

Dean Nobles and Dr. Stephens both travel 10 miles to get to Washington Shores Elementary. They each leave their houses at 7:00am. Dean Nobles arrives to school at 7:30am and Dr. Stephens arrives to school at 7:54am. Which statement below is true?

• Dean Nobles traveled at a greater speed than Dr. Stephens.

• Dr. Stephens traveled at a greater speed than Dean Nobles.

• Since both Dean Nobles and Dr. Stephens traveled the same distance, they both had the same speed.

• Neither Dr. Stephens nor Dean Nobles had speed.

Multiple Choice

Miss. Bookout was moving a bookshelf across the sidewalk outside. Although she pushed with all of her force, the bookshelf would only move a few inches at a time. Which of the following statements explains why this happened.

• The force of friction was resisting the motion of the bookshelf.

• Miss. Bookout needs to get to the gym more often.

• The bookshelf was pushing back against Miss. Bookout.

• The force of magnetism repelled Miss. Bookout's force.

Multiple Choice

Observe the battery that is balanced on the textbook. What would need to occur in order for this battery to slide down the book?

• Magnetism

• Gravity

• An unbalanced force, such as a push or pull.

Multiple Choice

Ms. Carter walked down the 5th grade hallway. Which statement is true about her movement?

• Ms. Carter changed position.

• Ms. Carter did not change position.

• Ms. Carter's speed did not change.

Motion

When an object is in motion it always changes its position and may change its direction.

Multiple Choice

Think back to the marble ramp activity. What happened as the marble rolled?

• Friction caused the marble to roll down the ramp faster.

• Gravity was opposed by friction.

• The force of gravity pulled the marble down the ramp.

Gravity is the force which pulls all objects down toward the center of Earth.

Multiple Choice

Which one of the following statements is true based on the image?

• The cart will move faster than the car.

• Both objects will move with the same speed.

• Neither object will be in motion.

• The car will move with greater speed than the cart.

If you apply the same amount of force to objects with different amounts of mass, then the object with the least amount of mass will travel farther and with more speed.

Greater mass = more force needed to change speed

Less mass = less force needed to change speed

Multiple Choice

Why are the plants not falling to the ground?

• The forces acting on the picture are unbalanced.

• There are no forces acting on the plants.

• The forces acting on the picture are balanced.