New SSA Questions Balanced and Unbalanced Forces

If all other factors were kept the same, what would happen if the weight in this plane were significantly increased?

• The plane would have negative acceleration, because the drag would increase

• The plane would have positive acceleration upward, because the lift would become greater than the drag

• The plane would have positive acceleration downward, because the weight would become greater than the lift

• The plane would have positive acceleration forward, because the thrust would become greater than the drag

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

The pilots are told that they are approaching winds traveling from the east towards the west. What changes can the pilot predict?

• The plane would have negative acceleration, because the drag would increase

• The plane would have positive acceleration upward, because the lift would become greater than the drag

• The plane would have positive acceleration downward, because the weight would become greater than the lift

• The plane would have positive acceleration forward, because the thrust would become greater than the drag

Tags

NGSS.MS-PS2-2

If the plane in the diagram continued moving at a constant speed, which  graph would represent the relationship between distance and time?

• A

• B

• C

• D

The force that causes a rocket to rise from the ground is called thrust. It is provided by the gases ejected from the rocket engines at the base of the rocket. What must the relationship between thrust and gravity be in order for the rocket to leave the ground?

• Thrust must be of a lesser magnitude than gravity and applied in the same direction as gravity

• Thrust must be of a lesser magnitude than gravity and applied in the opposite direction as gravity

• Thrust must be of a greater magnitude than gravity and applied in the same direction as gravity

• Thrust must be of a greater magnitude than gravity and applied in the opposite direction as gravity

Tags

NGSS.MS-PS2-2

Force applied by air resistance on flying objects is called drag. It is applied against the direction of the object’s motion. Drag is sometimes useful to flying objects. In which situation would drag be a useful force?

• when walking in a high wind

• when using a parachute

• when using an umbrella

• when using a balloon

What would a graph of distance over time look like for a plane that takes off, flies at a constant speed, and then lands back where is started from?

• an upside-down V

• a straight angled line

• an upside-down u with a flat top

• a sharp curve turning upward

If the students had hiked back to the bus at the same rate of speed they hiked away from the bus, how much sooner would they have been able to get back to school, if the bus ride took the same amount of time in both directions?

• 20 minutes

• 30 minutes

• 50 minutes

• about 110 minutes

A student viewed the graph representing the hike, and argued that the graph was wrong, because it shows they traveled a distance of 0 km. Which explanation would best address this student’s argument?

• The student is correct, the graph is wrong

• The graph shows 0 km traveled because the students hiked an equal distance in opposite directions

• The graph shows 0 km traveled because the hiking path was most up and down a hill

• The graph shows 0 km traveled because the speed of the hikers varied

Which of the following situations would require the students to update their graph

• discovering that some of the students went on opposite sides of a rock in the trail

• finding out that the bus was parked in a different parking lot when it picked the students up after the hike

• realizing that one student stopped to tie a shoelace and ran to catch up with the group

• learning that each student took more steps during the hike than other students

What is the net force?

• 15 N sitting still

• 45 N moving to the right

• 15 N moving to the right

• 15 N moving to the left

Tags

NGSS.MS-PS2-2