IQWST - PS3

A magnet is floating motionless above another magnet in a container.

What are the forces acting on the lower magnet? Which answer choice shows the forces on the lower magnet.

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Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

What is the relation between the two forces acting on the upper magnet?

• The one acting upward is greater than the one acting downward.

• The one acting downward is greater than the one acting upwards.

• Both act in the same direction.

• They are equal.

Tags

NGSS.MS-PS2-2

What are the two forces acting on the upper magnet?

• The magnet′s weight and the magnetic force attracting it to the lower magnet.

• The magnet′s weight and the magnetic force pushing it away from the lower magnet.

• Two magnetic forces: one attracting it to the lower magnet and another pushing it away from the lower magnet.

• The upper magnet′s weight and mass.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-5

Why is the box sitting on the table not moving?

• No forces are acting on the box.

• The table pushes up with the same force that gravity pulls down.

• Gravity is keeping the box down on the table.

• Gravity is pulling down, but the table is in the way.

Tags

NGSS.MS-PS2-4

A rocket in outer space is traveling toward a far-off planet. An astronaut turns on the rocket’s engines, which exerts a force on the rocket. There is no gravity or air resistance.

While the engines are on, how will the rocket move?

• The rocket will move at a constant speed.

• The rocket will move faster and faster as long as the engines are on.

• The rocket will move faster and faster until it reaches its maximum speed.

• The rocket will move only while the engines are on.

Tags

NGSS.MS-PS2-2

When the astronaut turns off the engines, what will the rocket do?

• It will steadily slow down until the force from the engines is gone.

• It will steadily slow down because no forces are acting on it.

• It will continue moving with a constant speed because no forces are acting on it.

• It will continue moving with a constant speed because the force from the engines is still acting on it.

Tags

NGSS.MS-PS2-2

When the ball is on its way down through point A, what force(s) are acting on it?

• There are no forces acting on the ball.

• Only the force from Lisa’s push is acting on the ball.

• Only gravity and air friction are acting on the ball.

• Both gravity and the force from Lisa’s push are acting on the ball.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

When the ball is on its way back up through point B, what force(s) are acting on it?

• Only gravity and air friction are acting on the ball.

• Only the force from the floor is acting on the ball.

• Both gravity and the force from the floor are acting on the ball.

• There are no forces acting on the ball.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

NGSS.MS-PS2-1

On a visit to a science lab, Madison observes a blob of shiny material that is floating in the air. The blob is not moving.

What can she conclude about the force(s) acting on the blob?

• Gravity cannot be acting on the blob because it is not falling down.

• Gravity must be acting on the blob or it would be floating.

• There are no forces acting on the blob because it is not moving.

• Each force acting on the blob has another one to cancel it out.

Amelia hits a puck across the gym floor. She then observes the speed of the puck. Which of the following observations is most likely?

• The speed is constant because the force from Amelia’s hit is still acting on the puck.

• The speed is constant because there is no force acting on the side of the puck.

• The speed is decreasing because there is friction between the puck and the floor.

• The speed is zero because there is no force acting on the side of the puck.

Tags

NGSS.MS-PS2-2