Newtonian Mechanics

What is the net force?

• 40 N left

• 0 N Balalnced

• 400 N right

• 40 N right

Answer explanation

The net force is determined by the direction and magnitude of the forces acting on an object. In this case, a net force of 40 N to the right indicates that the rightward forces exceed the leftward forces, confirming the correct answer.

Tags

NGSS.MS-PS2-2

What is the net force?

• 30 N left

• 25 N right

• 5 N left

• 55 N right

Answer explanation

To find the net force, subtract the forces acting in opposite directions. If 25 N right and 30 N left are acting, the net force is 30 N left - 25 N right = 5 N left, which is the correct answer.

Tags

NGSS.MS-PS2-2

Which could be an example of an unbalanced force?

• A plate sitting on a dining table

• A ball at the top of a hill that is not moving

• Earth orbiting the Sun 

• A baseball that has been thrown to home plate.

Answer explanation

An unbalanced force causes an object to accelerate. A baseball thrown to home plate experiences a force that changes its motion, unlike the other options, which are either at rest or in stable motion.

Tags

NGSS.MS-PS2-2

You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?

• 60 N right

• 10 N left

• 60 n right

• 50 N left

Answer explanation

To find the net force, add the forces together: 35 N (dad) + 25 N (you) = 60 N to the right. Therefore, the net force on the couch is 60 N right.

Tags

NGSS.MS-PS2-2

What is the net force?

• 30 N left

• 25 N right

• 5 N left

• 55 N right

Answer explanation

To find the net force, subtract the forces acting in opposite directions. If 30 N left and 25 N right are acting, the net force is 30 N - 25 N = 5 N left, making '5 N left' the correct answer.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

The sum of all forces acting on an object and direction

• Contact Force

• Balanced Force

• Unbalanced Force

• Net Force

Answer explanation

The net force is the vector sum of all forces acting on an object, determining its motion. It accounts for both magnitude and direction, making 'Net Force' the correct choice.

Tags

NGSS.MS-PS2-2

Balanced or Unbalanced?

• Balanced 

• Unbalanced

Answer explanation

The situation is Unbalanced because the forces or elements involved do not equalize, leading to instability. A balanced scenario would have equal forces acting in opposite directions.

Tags

NGSS.MS-PS2-2

Are forces balanced or unbalanced when a marble rolls down a ramp?

• Balanced

• Unbalanced

Answer explanation

The forces are unbalanced when a marble rolls down a ramp because gravity pulls it downward, causing it to accelerate. This results in a net force acting on the marble, making the forces unbalanced.

Tags

NGSS.MS-PS2-2

What is the unit to MEASURE force?

• Kilogram

• Meter

• Pascal

• Newton

Answer explanation

The unit to measure force is the Newton. It is defined as the force required to accelerate a one-kilogram mass by one meter per second squared, making it the correct choice among the options provided.

Tags

NGSS.HS-PS2-1

A ____________ is a push or a pull on an object.

• friction

• force

• magnet

• gravity

Answer explanation

A force is defined as a push or pull acting on an object. It can cause an object to move, stop, or change direction. Therefore, the correct answer is 'force'.

Tags

NGSS.HS-PS2-1