Motion and Stability

Gary designed an experiment. He made a parachute and dropped it from 5 feet in the air. He wanted the parachute to fall slower. What modification (change) could he make to the parachute to get it to fall slower? Mark all that apply.

• longer suspension lines

• canopy without holes

• large canopy

Tags

NGSS.MS-ETS1-4

NGSS.MS-PS2-2

What evidence supports the claim that the model of the water atmosphere is thicker?

• The golf ball falls faster in the water atmosphere than the air atmosphere.

• The golf ball falls slower in the water atmosphere than the air atmosphere.

• The golf ball falls slower in the air atmosphere than the water atmosphere

Tags

NGSS.MS-PS2-2

A ____________ force is when one force is larger than the other. The object will then

change its speed or the direction it is moving in.

• balanced

• unbalanced

Tags

NGSS.MS-PS2-2

Name 4 forces that affect whether a balanced/unbalanced force occurs? gravity, push, _______, friction

• air resistance

• weight

• pull

• tension

The diagram represents circular motion. A ball, object B, is attached to a string. The ball is twirling around point O on the string at a constant speed. What is true about the ball's motion? The ball's position and _________ have changed

• Nothing about the motion of the ball has changed

• The ball's position and speed has changed

• The ball's position and direction have changed

• The ball's position has changed, but its direction has not

The motion of the earth around the sun is best described as __________ motion.

• curved motion.

• vibrating motion.

• projectile motion.

• straight line motion.

Tags

NGSS.MS-ESS1-2

If a ball is thrown in any direction, what will cause the ball to fall back to earth?

• weak electric force of the earth.

• strong magnetic force of the earth.

• strong gravitational force of the earth.

• force of air resistance on the ball.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A man is whirling a rubber cork, tied with a string to his finger, over his head. The motion of the cork is similar to the motion of a planet in the Solar System around the Sun. Which force in the Solar System is similar to the tension in the string? ___________

• Nuclear force

• Magnetic force

• Gravitational force

• Electrostatic force

Tags

NGSS.MS-PS2-4

Predict the swinging height using the graph at 12 seconds.

• 2 feet

• 4 feet

• 6 feet

• 10 feet

Tags

NGSS.MS-PS3-1

If a baseball is thrown in a straight path, what two forces cause the ball to eventually stop moving?

• gravity and friction

• mass and ground force

• wind resistance and mass

• negative acceleration and gravity

Tags

NGSS.MS-PS2-2