Science Tek

Students are investigating changes from potential to kinetic energy by rolling a marble down a ramp made by propping up a plastic ruler on a book and letting it roll down. Which of the following will change the potential energy the marble starts with?

• Switching the plastic ruler with a wooden one
• Adding more books beneath the ruler
• Pushing the marble down the ramp
• Replace the marble with a rock

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-4

The image here shows four soccer balls at four different locations on an uneven soccer field very near sea level. Which soccer ball has the greatest amount of potential energy?

• Ball A
• Ball B
• Ball C
• Ball D

Tags

NGSS.MS-PS3-2

At which position does the pendulum have the most kinetic energy?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

NGSS.MS-PS3-1

The illustration shows a rollercoaster and indicates four different positions the car might be at as it moves along the track. At which point in the rollercoaster’s journey is its potential energy the greatest?

• w
• x
• y
• z

Tags

NGSS.MS-PS3-2

A box and forces are shown below. A box rests motionless on the ground. One student is pushing the box to the right with a force of 2 Newtons. The other student is pushing to the left with a force of 5 Newtons. In which direction and with what type of speed will the box move?

• It will move left at a constant speed
• It will move left at an increasing speed
• It will move right at a constant speed
• It will move right at an increasing speed

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

What motion will result from two forces acting on an object: one force of 50 Newtons to the east, the other a force of 30 Newtons to the west? The object will 

• move east at a constant speed
• accelerate to the east.
• move west at a constant speed.
• accelerate to the west.

Tags

NGSS.MS-PS2-2

Two horses pull in opposite directions, but together move in the direction shown. Which of the following best describes the forces being applied in this situation?

• The forces are balanced, and the net force is zero
• The forces are unbalanced, and the force of Horse 1 is greater
• The forces are unbalanced, and the force of Horse 2 is greater
• The forces are balanced, and the force of Horse 1 is greater

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

A game of tug-of-war, in which two teams pull on opposite ends of a rope, is illustrated here. The center of the rope will move when which of the following is true?

• The ground provides no friction for either team
• One team has more people than the other
• The rope has essentially no mass of its own
• One team pulls with more force than the other

Tags

NGSS.MS-PS2-2

The forces acting on a box are illustrated below. The result of these forces will be that the box will –

• move to the right at a constant speed.
• accelerate to the right
• move to the left at a constant speed.
• accelerate to the left.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

An object that is at rest will begin to move if which of the following is true?

• The surface on which it rests is frictionless
• The mass of the object is sufficient
• Unbalanced forces act on the object
• Gravity on the object can be reduced

Tags

NGSS.MS-PS2-2