Box friction review

Box friction review

Solving Forces

• draw free body diagram

• label what you know

• identify the x (horizontal) and y (vertical) components

• use your equations to solve for missing variables

A 20.0-kg crate is at rest on a floor as shown in The coefficient friction between the crate and floor is 0.70. A horizontal force of 180 N is applied in the right direction.

draw a free body diagram

Multiple Select

A 20.0-kg crate is at rest on a floor as shown in The coefficient friction between the crate and floor is 0.70. A horizontal force of 180 N is applied in the right direction.

What are the y (vertical) Forces acting on the box

• F_g

• F_N

• F_k

• F_a

Multiple Select

A 20.0-kg crate is at rest on a floor as shown in The coefficient friction between the crate and floor is 0.70. A horizontal force of 180 N is applied in the right direction.

What are the x (horizontal) Forces acting on the box

• F_g

• F_N

• F_k

• F_a

F_g=mg

g is the acceleration due to gravity

Multiple Choice

Is the box accelerating in the vertical direction?

• Yes

• No

Newton's 3rd law

equal and opposite

Multiple Choice

A 20.0-kg crate is at rest on a floor as shown in The coefficient friction between the crate and floor is 0.70. A horizontal force of 180 N is applied in the right direction.

is the box accelerating in the X (horizontal) direction?

• yes

• no

F=ma

Good Job