KE and GPE calculations and Conservation

Your Oscar trophy has a mass of 4 kg and sits on a shelf 2 m off the ground. What is the gravitational potential energy?

• 39.2 J

• 8 J

• 78.4 J

• 16 J

Answer explanation

Don't forget to account for acceleration from gravity (9.8 m/s²)

Tags

NGSS.MS-PS2-4

Your 20 gallon fish tank has a mass of 80 kg when full. If it sits on a 1.5 m stand, what is its gravitational potential energy?

• 1176 J

• 90 J

• 81.5 J

• 784 J

• 120 J

Answer explanation

Don't forget to account for acceleration from gravity (9.8 m/s²)

Tags

NGSS.MS-PS2-4

Your mass is 72 kg. You climb to the top of a 3 m ladder. What is your gravitational potential energy?

• 324 J

• 2116.8 J

• 216 J

• 705.6 J

• 24 J

Answer explanation

Don't forget to account for acceleration from gravity (9.8 m/s²)

Tags

NGSS.MS-PS3-2

NGSS.MS-PS2-4

Your stylin El Camino has a mass of 1400 kg. What is its kinetic energy if it is traveling 5 m/s?

• 17500 J

• 7000 J

• 3500 J

• 68600 J

• 34,300 J

Tags

NGSS.MS-PS3-1

Your 2nd favorite bowling ball has a mass of 5 kg. What is its kinetic energy if you roll it 7 m/s?

• 0.71 J

• 245 J

• 343 J

• 35 J

• 122.5 J

Tags

NGSS.MS-PS3-1

Your 1 kg laptop falls off the balcony. Right before it hits the ground it's moving at 15 m/s. How much kinetic energy will your broken dreams have?

• 225 J

• 15 J

• 112.5 J

• 147 J

• 7.5 J

Answer explanation

Don't forget to account for acceleration from gravity (9.8 m/s²)

Tags

NGSS.MS-PS3-1

A large bald eagle has a mass of 6 kg and can dive at a speed of 30 m/s. What would its kinetic energy be?

• 2700 J

• 180 J

• 5400 J

• 1764 J

• 90 J

Tags

NGSS.MS-PS3-1

A 2kg hammer is hanging on your garage wall 2m off the ground. What is its gravitational potential energy?

• 2 J

• 4 J

• 39.2 J

• 8 J

• 78.4 J

Answer explanation

Don't forget to account for acceleration from gravity (9.8 m/s²)

Tags

NGSS.MS-PS3-2

NGSS.MS-PS2-4

mgh is the equation for...

• thermal energy

• chemical potential energy

• kinetic energy

• gravitational potential energy

Tags

NGSS.MS-PS3-2

 $\frac{1}{2}mv^2$   is the equation for...

• thermal energy

• chemical potential energy

• kinetic energy

• gravitational potential energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5