DE -- Gravitational Potential Energy

If an object is lifted straight up at constant speed, then the force needed to lift it is equal to ___.

• the component of forces

• the static force

• the normal force

• its weight.

Tags

NGSS.MS-PS2-4

In the reading, the symbol for Gravitational Potential Energy is ___.

• F_PE

• PE_g

• F_GPE

• G_PE

Tags

NGSS.MS-PS3-2

Why is potential energy a property of a "system" and not a single object?

• because an object's gravitational potential is due to its position relative to its surroundings within a system

• because an object's gravitational potential is due to its motion resulting from the sum of forces acting on the object alone

Tags

NGSS.MS-PS3-2

The units for gravitational potential energy are ___.

• mgh

• Newtons

• joules

• m/s

Tags

NGSS.MS-PS3-2

The kangaroo is a unique large mammal because ___.

• It is the only large mammal to use its tail for balance.

• It is the only large mammal to use hopping for locomotion.

• It is the only large mammal to keeps its young in a pouch.

• Its upper body mass is less than its lower body mass.

To solve a problem involving roller coasters like this one, which equation is useful?

• KE = mgh

• a = v/t

• F = m a

• -PE_g = KE

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

Which of the following pictures was NOT found in the reading assignment?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS3-1

At the end of the reading, there is a suggested at-home investigation to explore converting potential to kinetic energy. What is the activity?

• throwing a ball with a pet dog

• riding your skateboard down a hill

• rolling a marble down a ruler

• dropping an object from a height

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

The work done by or against the gravitational force depends only on ___.

• the mass of the object

• the value of gravity

• the path between the initial and final points

• the starting and ending points

The reading explores the steps to solve roller coaster problems using the equation shown. During the calculations, which variable will cancel?

• mass

• height

• velocity

• gravity

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

NGSS.MS-PS3-1

NGSS.MS-PS3-5