work and energy quiz

What type of energy transformation happens in a flashlight?

• electrical energy--->chemical energy---->light energy

• chemical energy---->light and sound energy

• chemical energy----> light and heat energy

• electrical energy--->light and heat energy

What happens to the energy of the ball as it falls from point B to D?

• the ball is losing potential energy and gaining kinetic energy

• the ball is losing kinetic energy and gaining potential energy

• the ball is only gaining chemical energy

• the amount of kinetic and potential energy in the ball do not change

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

if a load of a lever is 100 newtons and the force you apply is 20 newtons, what is your mechanical advantage?

• 120 N
• 5 N
• 2000 N
• 80 N

• 100%

• 80%

• 40%

• 10%

Tags

NGSS.MS-PS3-3

• 100%

• 80%

• 40%

• 20%

What is the efficiency of the machine if the input is 263 J and the output is 142 J? 

• 6.26%
• 54%
• 100%
• 260%

What is the formula for work?

• W=(F)(d)

• E=[(Wo)/(Wi)]x100

• MA=(Of)/(If)

• KE=(1/2)(m)(v^2)

Tags

NGSS.MS-PS3-5

What is the formula for Efficiency?

• W=(F)(d)

• E=[(Wo)/(Wi)]x100

• MA=(Of)/(If)

• KE=(1/2)(m)(v^2)

What is the formula for Mechanical Advantage?

• W=(F)(d)

• E=[(Wo)/(Wi)]x100

• MA=(Of)/(If)

• KE=(1/2)(m)(v^2)

What is the formula for Gravitational Potential Energy?

• W=(F)(d)

• GPE=(m)(g)(h)

• MA=(Of)/(If)

• KE=(1/2)(m)(v^2)

Tags

NGSS.MS-PS3-2