Gravitational Potential Energy Review

Which of the following is not a factor in PEg?

• Acceleration due to gravity.

• The height of an object.

• The speed of travel of an object.

• The mass of an object.

Why do object not have PEg in space?

• Because their mass is zero.

• Because gravity is zero.

• This is false, objects always have PEg.

Tags

NGSS.HS-PS2-4

A 20 kg box is lifted 6 m above the ground. How much PEg does it have?

• 120 J

• 200 J

• 1200 J

• 60 J

Tags

NGSS.MS-PS3-2

A ball is elevated some distance off the ground. If it has a mass of 3 kg and a potential energy of 90 J, how high off the ground is the ball?

• 2700 m

• 27 m

• 900 m

• 3 m

Tags

NGSS.MS-PS3-2

What happens to the PEg of a rock that sits on the edge of a cliff as it starts to fall?

• The rock loses PEg and gains KE.

• The rock loses KE and gains PEg.

• The rock retains all its PEg and gains KE

• The rock retains both PEg and KE

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

Which of the following statements is implied by the law of conservation of energy?

• Energy is static and unchanging.

• Energy only ever transforms or transfers.

• Energy will eventually run out.

• None of these.

Tags

NGSS.HS-PS3-2

NGSS.HS-PS1-4

NGSS.HS-PS3-3

NGSS.HS-PS3-4

Which statement is most true of the term "g" in PEg?

• It is the letter used to denote gravity.

• It is the letter used to denote the speed of an object.

• It is the letter used to denote the acceleration of an object that is caused by gravity.

• It does not form part of the equation for PEg.

Tags

NGSS.HS-PS2-4

A leaf has fallen off a tree and hit the floor of the woods. Why is PEg = 0 J ?

• The leaf is no longer being acted upon by gravity.

• The leaf no longer has any height off the ground.

• The leaf no longer has any mass.

• The leaf does not have 0 J of PEg.

Tags

NGSS.MS-PS3-2

A 50 kg jogger jumps 1.6 m off the ground. How much energy did they use to do this?

• 80 J

• 500 J

• 160 J

• 800 J

Tags

NGSS.HS-PS3-1

On the moon, g = 1.6 m/s^2. A basketball has a mass of 0.6 g and the basketball hoop is usually 3 m above the ground. Assuming you want to use the SAME AMOUNT OF ENERGY AS ON EARTH, at what height would you have to put the hoop on the moon?

• About 19 m.

• About 3 m

• About 5 m

• About 2 m

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-1