Work-Energy Theorem

What is Newton's first law?

• For every action, there is an equal and opposite reaction.

• An object in motion or at rest will stay in motion or at rest until acted upon.

• F=ma

• Something about penguins.

What are the units for Work?

• Newtons

• Kilograms

• Joules

• Moles

What is the equation for Work?

• W = Fd

• W = md

• W = Fa

• W = mv

If you had a force (F) of 20N pushing a ball 2 meter (m), what would be the Work (W) being done?

• 10 Joules

• 40 Joules

• 22 Joules

• 18 Joules

What is the equation for Kinetic Energy (KE)?

• $KE\ =\ 2mv^2$

• $KE\ =\ 2mv$

• $KE\ =\ mv^2$

• 
  

  $KE\ =\ \frac{1}{2}mv^2$

Tags

NGSS.HS-PS3-2

Work can also be shown as

 $W\ =\ \Delta KE$ 

How do you find  $\Delta KE$  ?

•  $KE_i\ -\ KE_f$  

•  $KE_f\ -\ KE_i$  

•  $KE\ +\ KPOP\ =\ BbyMtl$  

•  $42?$  

Tags

NGSS.HS-PS3-1