Work and Energy

Why are work and energy fundamental concepts in physics?

• They describe chemical reactions

• They help us understand force interactions with objects

• They explain biological processes

• They are only relevant to thermodynamics

Tags

NGSS.HS-PS2-1

NGSS.HS-PS3-1

NGSS.HS-PS3-2

NGSS.HS-PS3-4

How do work and energy help us understand forces?

• By showing how forces interact with motion and physical systems

• By explaining the chemical properties of objects

• By defining the speed of sound

• By focusing solely on gravitational effects

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

NGSS.HS-PS2-3

NGSS.HS-PS3-1

NGSS.HS-PS3-2

What do work and energy primarily describe?

• The color and texture of objects

• The motion and changes in physical systems

• The molecular structure of objects

• The design of electrical circuits

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

NGSS.HS-PS3-3

What is the formula for work?

• W = Fg

• W = mv²

• W = Fd

• W = mg

In what units is work measured?

• Newtons (N)

• Joules (J)

• Meters (m)

• Kilograms (kg)

Tags

NGSS.HS-PS2-1

When is no work done?

• When the force causes motion

• When the force is perpendicular to movement

• When the force is applied over a long distance

• When the force is very strong

What kind of quantity is work?

• Vector (magnitude and direction)

• Scalar (magnitude only)

• Gravitational

• Kinetic

What is the formula for kinetic energy?

• KE = mv

• KE = ½mv²

• KE = mgh

• KE = Fd

How does kinetic energy change with velocity?

• It decreases linearly with velocity

• It increases proportionally with velocity

• It increases with the square of velocity

• It remains constant regardless of velocity

In what units is kinetic energy measured?

• Newtons (N)

• Joules (J)

• Meters (m)

• Kilograms (kg)