Conservation of Mechanical Energy Quiz

At which point is potential energy greatest?

• W
• X
• Y
• Z

Based on the diagram of a roller coaster car on a roller coaster track, what statement is true?

• The car at point A has more kinetic energy than the car at point C

• The car at point C has less kinetic energy than the car at point B.

• The car at point C has more kinetic energy than the car at point B.

• The car at point D has less potential energy than the car at point B.

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

What is the Kinetic Energy at point B?

• 500,000 J

• 400,000 J

• 300,000 J

• 50,000 J

Tags

NGSS.HS-PS3-1

A 40 kg crate is picked up by a crane to a height of 50m. The crate falls. What is the velocity of the crate just before it hits the ground?

• 2000 Joules
• 19,600 Joules
• 19,600 m/s
• 31.3 m/s

Tags

NGSS.HS-PS2-4

A 1.0 kg ball is stationary at the top of a hill that is 10.0 meters in height. The ball rolls all the way down the hill. What is its gravitational potential energy at the bottom of the hill?

• 0 joules

• 98 joules

• 49 joules

• 38 joules

Tags

NGSS.MS-PS3-2

A roller coaster uses a motor to take a car to the top of its first hill. The roller coaster then travels down a 35 meter hill and to the top of the next hill. It travels with a speed of 15 m/s at the top of the second hill.

How high is the second hill? Assume no energy is lost to friction and the coaster starts from rest at the top of the first hill.

• 12.5 m

• 24 m

• 34 m

• This cannot be determined without the mass of the car.

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

Which of the is the equation for calculating work?

• W = Fd

• W = ma

• W = mv

• W = mc²

An object is speeding up when: (Choose All That Apply)

• it is gaining kinetic energy.

• it is losing kinetic energy.

• it is gaining gravitational potential energy.

• it is losing gravitational potential energy.

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

The sum of the kinetic and potential energy in a system is known as the system's _____________________ energy.

• mechanical

• chemical

• thermal

• combined

Tags

NGSS.MS-PS3-4

What are the units for energy?

• Watts

• Joules

• Newtons

• meters