Show:
kinetic energy
Forms Of Energy
Frictions of gravity
Conservation energy
What does "balanced forces" mean?
100

what is kinetic Energy

the energy an object has because of its motion, dependent on its mass and speed

100

an object has a kinetic energy of 100 j and a mass of 10 kg how fast is the object moving

4.47 m/s

100
  • What is rolling friction?

resistance) is the force that opposes the motion of a ball, wheel, or cylinder as it rolls over a surface, caused primarily by the deformation

100

What is the Law of Conservation of Energy?

(Energy cannot be created or destroyed, only transformed).

100
  1. What does "balanced forces" mean?

two or more forces acting on an object are equal in strength (magnitude) but opposite in direction

200

How is kinetic energy different from potential energy

How is kinetic energy different from potential energy

200

Describe the energy transformations that occur in a typical light bulb.

 (thermal energy)

200
  • Give an example of sliding friction.

pushing a book across the table

200

What is thermal energy?

heat energy 

200
  1. Which type of force results in zero acceleration?

balanced force

300

what is the form used to calculate kinetic energy

KE = ½mv²

300

What are the energy transformations that happen when you strike a match

your hand's motion (mechanical energy)

300
  • Define the coefficient of friction.

a dimensionless number

300

What are the two main types of mechanical energy?

(Kinetic and Potential)

300
  1. How do balanced forces affect an object at rest?

they have no effect on its motion,

400

how does the kinetic energy relate to the work done on the object

the net work done on an object equals the change in its kinetic energy

400

What are some common examples of mechanical energy

moving cars, swinging pendulums, a hammer hitting a nail, a rolling ball, a flying airplane, and wind turbines spinning

400
  • Give daily life examples where frictional force is used.

write (pen/pencil on paper), drive (tire grip, braking), hold objects, and even light matches

400

Define Kinetic Energy (KE).

(Energy of motion)

400
  1. What is friction, and how does it relate to balanced/unbalanced forces? 

Friction is a force opposing motion between surfaces in contact, always acting opposite to movement, while balanced forces cancel out (no motion change), and unbalanced forces cause acceleration (motion change)

500

how do mass and speed affect kinetic energy of an object

Mass and speed both increase an object's kinetic energy (KE)

500

How do you measure energy in different scenarios (e.g., in food, in electricity)

Calories (kilocalories)

500
  • What is meant by the frictional force?

a contact force that resists the relative motion (sliding, rolling, or attempting to move) between two surfaces in contact, always acting opposite to the direction of motion or applied force, caused by microscopic irregularities and adhesion between the surfaces

500

When you burn wood, what happens to the chemical energy? 

Converts to heat/light).

500

What is the unit for measuring force

Newton (N)