7.L.1.1, 7.L.1.2, 7.L.1.3, 7.L.1.4

The diagram below shows four different objects that all start at the same place and move along the same path.

Which best describes the motion of these objects?

• Both Objects 2 and 3 are at a higher elevation than Object 1

• Both Objects 1 and 2 are at a lower elevation than Object 4

• Object 4 has traveled farther than the other objects.

• Object 1 has traveled farther than the other objects.

How do people determine if a vehicle in which they are sitting is moving?

ABCD

• by comparing their position to a fixed object inside the vehicle

• by comparing their position to a fixed object outside the vehicle

• by comparing their position to a moving object inside the vehicle

• by comparing their position to a moving object outside the vehicle

Alex is writing down notes as he watches his friend Carla in a bicycle race. He makes the following notes.

Which notes show that Carla’s bicycle is in motion?

• 1, 2, and 5

• 1, 2, and 3

• 2, 3, and 5

• 2, 3, and 4

Tags

NGSS.MS-PS3-1

Which is MOST likely needed when describing the change in position of an object?

• initial speed

• direction change

• reference point

• constant rate

The car is described as traveling east at 30 km/hr.

From which reference point in the diagram is the motion of the car MOST likely being described?

• 1

• 2

• 3

• 4

A jet plane is moving at a constant velocity on a flat surface. Which forces act against the forward motion of the plane?

• gravity and engine thrust

• engine thrust and friction

• friction and air resistance

• air resistance and gravity

As an object falls, air resistance gradually increases until it is equal with the pull of gravity. This effect is called

• final velocity

• initial velocity

• escape velocity

• terminal velocity.

Roland dropped a rubber ball straight down. After falling for 2 seconds, the ball struck the ground with a force of 50 newtons (N). Which vector illustrates the reaction force of the ground exerted on the ball?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-1

An object is traveling to the right. Which of the following shows a force acting on the object that will increase the speed of the object?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-1

A student pushes a box to slide it across the floor. Which statement explains why the box begins to move?

• The weight of the box is greater than the force of friction.

• The weight of the box is less than the force of friction.

• The applied force is greater than the force of friction.

• The applied force is less than the force of friction.

Tags

NGSS.MS-PS2-2