Forces

FIND THE NET FORCE ON THE OBJECT: IT IS YOUR LEFT AND RIGHT AS ARE YOU ARE FACING THE DIAGRAM

• 40 N; RIGHT

• 40 N; LEFT

• 20N; LEFT

• 20 N; RIGHT

Answer explanation

The net force is calculated by subtracting the left force from the right force. If the right force is 40 N and the left force is 20 N, the net force is 20 N to the right, making the correct answer 20 N; RIGHT.

Tags

NGSS.MS-PS2-2

FRICTION IS DEPENDENT ON THE THE FOLLOWING

• TYPE OF SURFACE, FORCE BETWEEN THE OBJECTS, AREA OF THE SUFACES IN CONTACT

• TYPE OF SURFACE, FORCE BETWEEN THE OBJECTS, SHAPE OF THE OBJECTS

• FORCE BETWEEN THE OBJECTS, AREA OF THE SUFACES IN CONTACT, TEMPERATURE OF THE SURFACE

• TYPE OF SURFACE, AREA OF THE SUFACES IN CONTACT, SHEEN OF THE SURFACE

Answer explanation

Friction depends on the type of surface, the force between the objects, and the area of the surfaces in contact. These factors determine how much resistance is encountered when two surfaces interact.

A turtle swiming through the water is an example of

• fluid friction

• both kinetic friction and fluid friction

• Static friction

• Kinetic friction

• sliding friction

Answer explanation

A turtle swimming through water experiences fluid friction, which is the resistance encountered when moving through a fluid. It also involves kinetic friction since the turtle is in motion, making both 'fluid friction' and 'both kinetic friction and fluid friction' correct.

A couch potato sitting on a couch watching TV is an example of

• Static friction

• Kinetic friction

• fluid friction

• sliding friction

• rolling friction

Answer explanation

A couch potato sitting on a couch is not moving, so the friction between the person and the couch is static friction. This type of friction prevents the person from sliding off the couch.

Where is there the MOST friction?

• Between a hockey puck and the ice

• Between a light object and a smooth surface

• Between a heavy object and a rough surface

• Between a heavy object and a smooth surface

Answer explanation

Friction is highest between a heavy object and a rough surface due to increased weight and surface irregularities, which create more resistance. Other options involve lighter weights or smoother surfaces, resulting in less friction.

What does friction do?

• Opposes motion when objects aren’t touching

• Opposes motion between two touching objects

• Increases motion of an object

• Increases net force

Answer explanation

Friction is a force that opposes motion between two touching objects. It acts to resist the sliding or rolling of surfaces against each other, making the correct answer 'Opposes motion between two touching objects'.

FIND THE NET FORCE ON THE OBJECT: IT IS YOUR LEFT AND RIGHT AS ARE YOU ARE FACING THE DIAGRAM

• 2N; RIGHT

• 10 N RIGHT

• 2 N; LEFT

• 10N LEFT

Answer explanation

The net force is determined by the vector sum of all forces acting on the object. If the forces to the right total 10 N and there are no opposing forces to the left, the net force is 10 N to the right.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

FIND THE NET FORCE ON THE OBJECT:

• 10 N; UP

• 10 N; DOWN

• 24 N; UP

• 24 N; DOWN

Answer explanation

The net force is calculated by considering all forces acting on the object. If the downward force is greater than the upward force by 10 N, the net force is 10 N; DOWN, making this the correct choice.

Tags

NGSS.MS-PS2-2

THE FORCES ON THE OBJECT ARE

• BALANCED, IT WILL MOVE DOWN

• BALANCED, IT WILL REMAIN AT REST

• UNBALACED, IT WILL MOVE UP

• UNBALANCED IT WILL REMAIN AT REST

• NONE OF THE CHOICES ARE CORRECT

Answer explanation

The correct choice is 'NONE OF THE CHOICES ARE CORRECT' because the question does not provide enough information to determine the state of motion or balance of the forces on the object.

Tags

NGSS.MS-PS2-2

THE FORCES ON THE OBJECT ARE

• BALANCED, IT WILL MOVE DOWN

• BALANCED, IT WILL REMAIN AT REST

• UNBALACED, IT WILL MOVE UP

• UNBALANCED IT WILL REMAIN AT REST

• NONE OF THE CHOICES ARE CORRECT

Answer explanation

The forces on the object are balanced, meaning the net force is zero. Therefore, it will not accelerate and will remain at rest, confirming the correct choice: BALANCED, IT WILL REMAIN AT REST.

Tags

NGSS.HS-PS2-1