PCS Moving Along 5th

How can the speed of an object best be determined?

• distance traveled divided by time it took to travel

• time it took to travel divided by distance traveled

• distance traveled divided by speed traveled

• speed traveled divided by distance traveled

Friction can be described as a:

• non-contact force
• contact force
• slowing of motion
• rough surface

(7) Which scenario is showing gravity as the main force moving an object?

• My pencil fell to the ground when I dropped it.

• A plane taking off.

• A feather floating in the wind.

• A boy threw a ball up in the air.

(16) A ball has two forces acting on it. One force is pushing it to the left, and a larger force is pushing it to the right. In which direction will the ball move?

• Right

• Left

• Up

• Down

A ball was rolling fast and then slowed. Which most likelycaused the ball to slow?

• heat

• friction

• momentum

• wind

A change in the position of an object

• Push

• Pull

• Position

• Motion

The 5th graders were playing a game of tug-of-war.  The class was divided equally with half the class on one side of the rope and the other half on the opposite side.  For 5 minutes the students pulled and pulled but neither side could pull the flag to one side or the other.  Choose the description of the forces during the 5th grade tug-of-war.

• The forces were unbalanced in the game.
• The forces were friction, gravity, and chemical energy.
• The students all had the same amount of strength.
• The forces were balanced in the game.

Which best describes the rate at which an object changes its position over time?

• force

• distance

• speed

• direction

5. An experiment is conducted to measure the amount of force required to push a square cardboard box from one side of the room to the other side. What variable is likely to lessen the force required?

• A. Adding several heavy weights to the box

• B. Tipping the box onto its side

• C. Adding another box on top

• D. Placing the box onto a wheeled cart

4 cars are at the starting line of a race. Which car will require the most force to start moving?

• car with mass of 1200 kilograms

• car with mass of 1500 kilograms

• car with mass of 1700 kilograms

• car with mass of 2000 kilograms