Kinetic and Potential Energy and Gravity

What is energy?

• The capacity of doing work.

• The electricity supplied by Eskom.

• The calories in the food that we eat.

• The ability to jump up and down.

Tags

NGSS.MS-PS3-5

What is the S.I unit of measurement of energy?

• kiloJoules

• Newtons

• Joules

• Pascals

What is the unit for mass?

• kilogram (kg)

• meter (m)

• Newton (N)

• Joule (J)

Kinetic energy is said to be the energy of ...

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What is the formula for kinetic energy?

• distance / time

• mass x acceleration

• velocity / time

• ½(mass) x (velocity)²

• (mass) x (acceleration of gravity) x (height)

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What is the unit for distance?

• kilogram (kg)

• meter (m)

• Newton (N)

• Joule (J)

What is the formula for gravitational potential energy?

• distance / time

• mass x acceleration

• velocity / time

• ½(mass) x (velocity)²

• (mass) x (acceleration of gravity) x (height)

Tags

NGSS.MS-PS3-2

How much gravitational potential energy does a 100kg (220lb.) skydiver have if they jump from 4000 meters?

• 3920000 J

• 294 J

• 180000 J

• 1225 J

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

A 6kg cat misjudges a jump and falls 5 meters. How much gravitational potential energy does the cat have? (The cat is fine by the way.)

• 294 J

• 180000 J

• 1225 J

• 3920000 J

Tags

NGSS.MS-PS2-4

What is the kinetic energy of a 1,600kg Mustang travelling at 15 m/s (33mph)

• 180000 J

• 294 J

• 1225 J

• 3920000 J

Tags

NGSS.MS-PS3-1