PHYS 211 MavPASS Week 10

what is the SI unit for work?

• Newtons (N)

• Joules (J)

• Coulombs (C)

• tension (T)

How much work does the student do to move the block 20 m?

• 10.86 N

• 217.2 J

• 24 J

• 0

  no work because there is no friction

Tags

NGSS.HS-PS2-1

How much work does the student do move the block 20m?

• 15.1 J

• 217.2 J

• 0.76 N

• 0.76 J

Tags

NGSS.HS-PS2-1

Write equation for kinetic energy

KE = _________

Tags

NGSS.HS-PS3-2

write equation for potential energy

PE=________

Tags

NGSS.MS-PS3-2

define a conservative force

• work done is conserved before and after work is done

• work done by force is dependent of the object's path

• work done by force is independent of the object's path

define conservation of energy

• kinetic energy will remain the same

• total energy in an isolated system will remain the same

• potential energy will remain the same

• energy will in an isolated system will change

Tags

NGSS.HS-PS3-2

how much potential energy does a 90 kg person standing on top of a 75 m building have?

• 6612.75 J
• 90000 J
• 66,150 J

• 0 J (he's not moving)

Tags

NGSS.MS-PS3-2

find the velocity of the ball at the bottom of the hill

(no friction between ball and hill)

• 46.1 m/s

• 18.4 m/s

• 340.0 m/s

• 12 m/s

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

A 50 kg swimmer is standing on a diving board 10 m above the pool. When the swimmer jumps off the board and is 6 m above the water, what is their velocity?

• 78.4 m/s

• 8.6 m/s

• 0.26 m/s

• 12.2 m/s

Tags

NGSS.HS-PS2-1