Force and Motion

Think about the floating magnet. What forces act on the upper magnet

• Gravity Only

• The lower magnet attracting the upper magnet.

• The lower magnet repelling the upper magnet.

• Gravity and the lower magnet repelling the upper magnet

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Think about the floating magnet. What is the relationship between the 2 forces acting on the upper magnet.

• The forces are working together in the same direction.

• The lower magnet is counteracting the force of gravity.

• The upward force is larger than gravity.

• Gravity is larger than the upward force.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Think about the floating magnet. What is the relationship between the upper and lower magnets?

• The forces are equal.

• The forces act in opposite directions.

• The forces are stronger the closer they get to each other.

• All of the above.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which force should be longer on this free-body diagram? Explain.

• The cap needs to be a larger force to hold in the cola.

• The weight should be a larger force because the bottle is heavy.

• The force of the bottle pushing up should be larger because it must cancel out both the force of the cap and the weight.

• All the vertical forces should be equal because the soda is in equilibrium.

Why does the soda spray out the top of the bottle when the cap is removed?

• Once the cap is removed, 2 vertical forces act on the soda instead of 3, so the vertical forces are balanced.

• Once the cap is removed, the vertical forces are unbalanced in an upward direction.

• Once the cap is removed, the vertical forces are unbalanced in a downward direction.

• Once the cap is removed, there is an unbalanced force applied sideways.

Tags

NGSS.MS-PS2-2

The students in the picture are pushing a box without any success. It just won't move. Which type of friction is acting on the box.

• Dynamic Friction

• Rollin Friction

• Static Friction

• No Friction

Tags

NGSS.MS-PS2-2

The students in the picture are pushing a box and it eventually begins sliding across the room. Which type of friction is acting on the box.

• Dynamic Friction

• Rollin Friction

• Static Friction

• No Friction

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which is larger? Dynamic Friction or Static Friction?

• Dynamic Friction

• Static Friction

What direction is dynamic friction applied to slow the motion of an object?

• In the same direction as the motion

• In opposite the direction of motion

• sideways to the direction of motion

• the friction must be balanced with the force applied to the object

Describe the motion of the object

• The object is not moving because the forces are balanced

• The object is moving at a constant speed because the forces are balanced

• The object is either not moving or moving at a constant speed. We need more information to determine which motion is occurring.

• The object is accelerating because the vertical and horizontal forces are not balanced.

Tags

NGSS.MS-PS2-2