Friction can be described as a:

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

Choose the BEST example of balanced forces.

• a car speeding up
• a leaf blowing in the wind
• a car moving at a constant speed
• a tennis ball bouncing back and forth between players.

Choose the BEST answer that describes how the mass of an object affects its motion.

• The greater the mass of an object, the slower the motion of the object.
• The greater the mass of an object, the faster the motion of the object.
• The greater the mass of an object, the greater the force to move the object.
• The greater the mass of an object, the greater the distance the object will travel.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

Melissa and Gabe were testing the flight of leaves as they tossed them in the air.  The leaves would go up and then came to a rest on the ground.  What force made the leaves land on the ground?

• gravity
• friction
• air pressure
• mass

Tags

NGSS.MS-PS2-4

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.

Tags

NGSS.3-PS2-1

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

Tags

NGSS.MS-PS2-2

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

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

• force

• distance

• speed

• direction

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

• heat

• friction

• momentum

• wind

Tags

NGSS.MS-PS2-2

2. By changing the surface over which the car rolls from sandpaper to wax paper, you might be able to test the effect of what force?

• A. Magnetism

• B. Wind

• C. Wind

• D. Friction

Tags

NGSS.MS-PS2-2