SL review session 2 HES 102

What type of work is being done to my hamstrings when flexing my knee?

• Positive

• Negative

• None

When throwing a ball in the air, when will KE=PE?

• At peak height

• When height is 0m

• Half peak height

• Half total air time

True or false, a stationary object will have a KE=0

• True

• False

True or false, I throw a ball in the air and right when the ball leaves my hands KE < PE

• True
• False

What is strain energy?

• The capacity to do work

• PE due to objects position

• work due to motion of an object

• PE due to deformation

Which of the following equations can be used to calculate power?

• P=mad/t

• P= Fv/t

• P=d/Ft

• P= t/U

• P=Fd/t

Tags

CCSS.8.EE.C.7B

Two workers use 100 N of force to move a sofa 2 meters in 2 seconds. How much power is required?

• 400W

• 200W

• 100W

• 50W

If 68 W of power is produced in 18 seconds, how much work is done?

• 1224J

• 0.254J

• 12.24J

• 3.77J

Tags

CCSS.7.RP.A.3

What is power?

• transfer of force through a distance

• the rate of speed 

• the rate of work being done

• transfer of space over time

True or false, maximal muscle power is generated a max velocity

• True
• False