Physics Work and Energy Concepts

Force and motion alignment for work

• Parallel

• Perpendicular

• Oblique

• Radial

Simple machine definition

• A device that does work with only one movement

• A complex mechanism requiring multiple movements

• A tool used for lifting heavy objects

• A machine that operates without any energy source

Equation for work

• W = F \times d

• W = F + d

• W = F / d

• W = F - d

Gravitational potential energy equation

• GPE = m × g × h

• GPE = m + g + h

• GPE = m / g × h

• GPE = m - g × h

Conservation of energy principle

• Total energy remains constant

• Energy can be created and destroyed

• Energy is always increasing

• Energy can only be transferred

Work done when object is at rest

• Zero

• Ten Joules

• One Joule

• Five Joules

Simple machine function

• Increases the amount of work done

• Reduces effort needed

• Increases the speed of an object

• Changes the direction of force

Joules to Calories conversion

• 2,000 J

• 4,000 J

• 1,500 J

• 3,500 J

Work done by a machine

• Depends on force and distance

• Is independent of the distance

• Is only dependent on the speed

• Is determined by the weight of the machine

Gravitational potential energy in projectile motion occurs at which point?

• At the highest point

• At the lowest point

• At the midpoint

• At the launch point