Forces, Distance v. Time

What is the net force of an object that is not moving?

• 0N

• 100N

• 25N

• 50N

Tags

NGSS.3-PS2-1

What will cause an object to move?

• a net force of 0

• applied force

• balanced force

• unbalanced force

Tags

NGSS.MS-PS2-2

What is the net force?

• 7000 N right

• 7000 N left

• 4000 N right

• 4000 N left

Tags

NGSS.MS-PS2-2

An object travels at constant speed, and its distance and time are shown in the graph. Using the formula S=d/t, find the average constant speed of the object between 3 and 5 seconds. 

• 25 m/s

• 50 m/s

• 150 m/s

• 300 m/s

Tags

NGSS.MS-PS3-1

If Boy X pushes by straightening his arms out while Boy Y holds his arms in the original position, what is the motion of the two boys?

• Boy X does not move and Boy Y moves backward

• Boy Y does not move and Boy X moves backward

• Boy X and Boy Y both move backward

• The motion depends on how hard Boy X pushes

Tags

NGSS.MS-PS2-1

The diagram shows forces acting on a model airplane. Both its speed and height above the ground are constant.

Which of the following conditions would cause the model airplane to descend toward the ground?

                   

• the lift is equal to the drag

• the lift is less than the weight

• the thrust is equal to the weight

• the thrust is greater than the drag

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What happens when the forces applied to an object at rest produce a net force of zero? 

• The object will move at a constant speed

• The object will have positive acceleration

• The object will have negative acceleration

• the object will not move at all

Carolina wanted to visit her grandmother. She decided to walk instead of bike due to the icy sidewalks. When she was almost there, she caught her toe on a tree root and tripped, falling to the ground. What happened to make Carolina fall? 

• contact force: her foot came into contact with the tree root 

• net force: the pull of the root was the same as the friction between her feet and the sidewalk

• unbalanced force: the pull of the root was stronger than the friction between her feet and the sidewalk

• balanced force: her foot came into contact with the tree root 

Students record information about the motion of an object in a straight line. They record their measurements in the table. Using the formula S=d/t, find the average speed of the object.

• 3 m/s

• 9 m/s

• 18 m/s

• 36 m/s

Students prepare to graph an object's information from the data table . They make the graph with time on the x-axis and distance on the y - axis. How would this object's motion appear on their graph?

• a line that curves downward

• a flat line that does not slope up or down

• a straight line that slopes upward

• a line that curves upward

Tags

NGSS.MS-PS3-1