Nature of Force

What is the best definition of force as defined by your textbook?

(a)  

A force is described by its __________ and by the __________ in which it acts.

• force

• strength

• direction

• angle

The direction and strength of a force can be represented by a(n) (a)  

The strength of a force is measured in the SI or metric unit called the ___________.

• pound (lb)

• neutron (n)

• newton (N)

• newton (n)

What is net force?

• The amount or net forces minus gravity.

• The amount of net forces plus gravity.

• The combination of all forces acting upon an object.

• The combination of all forces acting upon an object plus its mass.

Tags

NGSS.MS-PS2-2

What is the net force upon this object? Is it moving?

• 10 N left

• 0 N

• 10 N right

• yes

• no

Tags

NGSS.MS-PS2-2

What is the net force?

• 0 Newtons

• 1350 (N) to the right

• 150 (N) to the left

• 1200 (N) to the right

• 1200 (N) to the left

Tags

NGSS.MS-PS2-2

You push on a desk with a force of 120 N to the right. Your friend pushes o the same desk with a force or 90 N to the left. What is the net force on the desk? In what direction will the desk move?

• 30 N

• right

• 40 N

• left

Tags

NGSS.MS-PS2-2

Your friend increases her force on the desk from 90 N by 30 N to the right. What happens to the net force on the desk? Choose the BEST response.

• The desk gradually moves to the right.

• The desk does not move left or right.

• The net force on the desk is balanced. It does not move.

• The desk gradually moves to the left.

Tags

NGSS.MS-PS2-2

When a nonzero force acts upon an object, the force

• changes the motion of the object.

• must be greater than the reaction force.

• does not change the motion of the object.

• is equal to the weight of the object.

Tags

NGSS.MS-PS2-2