Physics

Formulas

100

What is the formula to use for finding force?

F=ma

200

What is the formula to use for finding Gravitational Force (F_g)?

F_g=ma_g

300

What is the formula for finding acceleration by using velocity?

a=v_f-v₀/t

400

What does the net force formula (F_y=ma_y) look like when we break it apart? 

F_N-F_g=ma_y

Finding Force

100

A box has a mass of 24 kg and a normal force of 72 N. What is the FBD?

Draw it

200

A cat has a mass of 43 kg. If the cat goes into an elevator, what normal force will the cat experience when the elevator is going down with a constant velocity of 2 m/s?

F_N=430N

300

A cat has a mass of 43 kg. If the cat goes into an elevator, what normal force will the cat experience when the elevator is going down with an acceleration of 3.1 m/s²?

F_N=296.7N

400

A 24 kg child enters an elevator. The elevator starts to go up starting from rest and reaches a speed of 7 m/s in 3 seconds. During this time period, what is the normal force that the child experiences?

F_N=295.92N

Finding Acceleration

100

When something is in constant velocity, what is the acceleration?

a=0 m/s²

200

What is the acceleration of gravity that we use in class?

10 m/s²

300

A person with a mass of 43.7 kg is in an elevator. The normal force is 493.81 N. What is the acceleration of the elevator?

1.30 m/s²

400

With some wire you pull up on an 11 kg crate. You pull up on it with a normal force of 74 N. What is the acceleration of the crate as you pull it up?

a= -3.27 m/s² 

Finding Tension

100

What is the symbol for tension?

F_T

200

What is the tension in the string?

m_box=34kg

F_T=340N

300

What is the tension in each string?

m_box1=12kg

m_box2=7kg

String 1= 190N

String 2= 70N

400

What is the tension in each string?

m_box1=8kg

m_box2=3kg

m_box3=23kg

String 1= 340N

String 2= 260N

String 3= 230N