Balanced/Unbalanced/Graphing

Which animals can run faster than 40 mph?

• cheetah, quarter racehorse, greyhound, ostrich

• cheetah, quarter racehorse, greyhound

• cheetah, quarter racehorse, ostrich

• cheetah, greyhound, ostrich

What can you conclude about the speed of the moving object plotted on this graph?

• speed is increasing over time

• speed is decreasing over time

• speed is constant over time

• the object has stopped moving

Tags

NGSS.MS-PS3-1

Speed is equal to distance divided by time. S = D/T
If an object is moving at 3 meters per second, how far will it move in 4 seconds?

• 12 meters

• 6 meters

• 3 meters

• not enough information to tell

Why do the values on the graph make a straight line?

• speed is constant

• distance is constant

• the direction of motion stays the same

• speed slowly increases over time.

Tags

NGSS.MS-PS3-1

What can you conclude about the motion of the object in the graph?

• speed is increasing at a constant rate (constant speed)

• the motion of the object is decreasing at a constant rate
  (slowing down at constant speed)

• the object is maintaining its direction of motion

• the object is returning to where it started

Tags

NGSS.MS-PS3-1

If an unbalanced force is applied to an object, what might happen?

• Only the speed will change

• Only the direction will change

• Speed and direction could both change

• neither speed or direction will change.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Ted pulled the bat with a force of 15 N. Al pulled the bat with a force of 20 N. Why did Al end up with the bat?

• Because the net force was 5 N in Al's direction

• Because the net force was 20 N in Al's direction

• Because the force was 15 N in Ted's direction

• Because the force was 5 N in Ted's direction

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Unbalanced forces can change direction an object moves. Look at the following choices and determine which object would move upward

• 
• 
• 
• 

Tags

NGSS.MS-PS2-2

Which of the following must be true if the force on an object is unbalanced?

• the push on each side must be equal

• The push on one side must be larger than the other side

• both forces must make the net force zero

• both forces must make a net force so that the object remains in one place.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which of the following must happen in order to determine the net force acting on an object that is being lifted by a pulley.
(How do you find net force????)

• gravitational force must be ignored

• all the forces on the object must be measured

• only the force pulling upward needs to be measured

• only the distance over which the object is lifted by the pulley must be measured

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS2-4