Exploring Free Body Diagrams and Newton's 2nd Law

What is the primary purpose of a free body diagram in physics?

• To calculate the speed of an object

• To determine and illustrate all applied forces on an object

• To measure the weight of an object

• To illustrate the motion of an object

Tags

NGSS.MS-PS2-2

In a free body diagram, what does the term 'free' refer to?

• An object that is stationary

• An object that is in space

• An object that is weightless

• An object that is not attached to anything and can move

What is the first step in creating a free body diagram?

• Drawing a box to represent the object

• Labeling the forces with arrows

• Deciding which object or body to focus on

• Determining all the forces acting on the object

In the example problem, what force is applied by the man pulling the truck?

• 21582 newtons

• 2200 newtons

• 1950 newtons

• 250 newtons

What is the force opposing the man's pull on the truck?

• The normal force

• The tension in the rope

• The frictional force

• The weight of the truck

What is the net force acting on the truck in the example problem?

• 21582 newtons

• 1700 newtons

• 250 newtons

• 1950 newtons

Tags

NGSS.MS-PS2-2

Why do we not consider the weight and normal force when calculating the net force in the horizontal direction?

• Because they act in the same direction

• Because they are too small

• Because they cancel each other out

• Because they are not present

What is the formula for Newton's second law?

• Force = mass / acceleration

• Force = mass * velocity

• Force = mass * acceleration

• Force = mass + acceleration

Tags

NGSS.MS-PS2-2

How do you solve for acceleration using Newton's second law?

• Add the mass to the net force

• Subtract the mass from the net force

• Multiply the net force by the mass

• Divide the net force by the mass

Tags

NGSS.MS-PS2-2

What is the acceleration of the truck in the example problem?

• 0.77 meters per second squared

• 9.81 meters per second squared

• 1.70 meters per second squared

• 2.20 meters per second squared

Tags

NGSS.MS-PS2-2