Forces and Motion

This image shows a crane lifting a concrete block. Which type of force is pulling the concrete block upward?

• The normal force pushing against the block.

• The gravitational force acting on the block.

• The gravitational force acting on the chains.

• The tension force transmitted through the chains.

Tags

NGSS.MS-PS2-4

A force of 20 N is acting on a box. What other information is needed to accurately describe this force?

Una fuerza de 20 N actúa sobre una caja. ¿Qué otra información se necesita para describir con precisión esta fuerza?

• The duration of the force.

• The motion of the box.

• The direction of the force.

• The mass of the box.

What is a force?

¿Qué es una fuerza?

• The speed at which an object moves.

• A source of energy in the universe.

• A push or pull acting on an object.

• The energy of an object.

Tags

NGSS.MS-PS2-1

_______ is a force that resists motion between surfaces that are in contact.

_______ es una fuerza que resiste el movimiento entre superficies que están en contacto.

• Resistance

• Acceleration

• Friction

• Inertia

An airplane is flying north. What is the direction of the air friction force acting on the plane?

Un avión vuela hacia el norte. ¿Cuál es la dirección de la fuerza de fricción del aire que actúa sobre el avión?

• West.

• East.

• North.

• South.

Tags

NGSS.MS-PS2-2

Kim is pushing a box on a flat surface. The box is moving. Which type of force is Kim using to move the box?

Kim empuja una caja sobre una superficie plana. La caja se mueve. ¿Qué tipo de fuerza está usando Kim para mover la caja?

• Friction force.

• Applied force.

• Normal force.

• Gravitational force.

Tags

NGSS.MS-PS2-2

An apple is on a table. The apple’s mass causes it to push on the table. Which force keeps this push in check?

Hay una manzana sobre una mesa. La masa de la manzana hace que empuje la mesa. ¿Qué fuerza mantiene este empujón bajo control?

• The gravitational force acting on the table.

• The normal force exerted on the apple by the table.

• The friction force between the apple and the table.

• The applied force acting on the apple.

What happens when balanced forces act on an object at rest?

¿Qué sucede cuando las fuerzas equilibradas actúan sobre un objeto en reposo?

• The object will push back with a greater force.

• The object will remain at rest.

• The object will move forward.

• The object will accelerate.

Two students are pushing a sofa across a room.

What is the net force applied to the sofa by the students?

• 400 N

• 250 N

• 200 N

• 150 N

Tags

NGSS.MS-PS2-2

The diagram shows forces acting on a wagon.

A wagon is pulled to the right using a force of 20 N and to the left using a force of 30 N. What is the net force on the wagon?

• 50 newtons to the right

• 50 newtons to the left

• 10 newtons to the right

• 10 newtons to the left

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2