Newton's Laws and Free Body Diagrams

John and Angie were each pushing a box across the floor. They both push their own box with a force of 30 Newtons; however, Angie's box does not move. What can you infer is the reason Angie's box didn't move?

• No work was done on the box.

• Gravity did not act on the box.

• John's box might have been on an incline.

• She was probably smaller than John so she didn't have enough strength to move the box.

Tags

NGSS.MS-PS2-2

Newton's First Law of Motion states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force change the motion. This is sometimes called the law of

• acceleration

• force

• inertia

• uniformity

The image shows two opposite forces acting on a rolling cart, what can we say is true about the effect of the forces on the cart?

• it cannot be determined without knowing which man is stronger

• it cannot be determined because one man is taller than the other

• the forces are unbalanced, and net force on the cart moves it left

• the forces are unbalanced, and net force on the cart moves it to the right

Tags

NGSS.HS-PS2-1

A 10-kg object is pushed across a rough surface. It begins at rest and accelerates to a speed of 4 m/s in a distance of 5m. Which fact(s) support the conclusion that the object experiences an unbalanced force?

• The rough surface has friction.

• The object has a mass of 10 kg

• The object accelerates across the surface.

• The object has a force applied to it and covers a distance.

Tags

NGSS.MS-PS2-2

Name the missing force...

• frictional force

• weight force

• thrust

• buoyant force

Tags

NGSS.MS-PS2-2

Which of the following is true about this free-body diagram?

• the forces are are balanced

• the object is free-falling

• the object is moving upward

• the forces are unbalanced

Name the missing force....

• weight force

• normal force

• frictional force

• tension force

Tags

NGSS.MS-PS2-4

Name the missing force...

• applied force

• weight force

• lift

• normal force

Name the missing force...

• normal force

• applied force

• frictional force

• tension force

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Name the missing force...

• applied force

• weight force

• tension force

• drag

Tags

NGSS.MS-PS2-2