Quiz on Energy Skate Park: Energy and Velocity

What does the PhET Interactive Simulation: Energy Skate Park primarily investigate?

• Biological processes in plants

• Quantum mechanics and particle physics

• Historical analysis of scientific discoveries

• Conservation of mechanical energy, potential energy, kinetic energy, and their relationship with velocity

What setting is used to ensure there is no energy loss due to friction in the simulation?

• High air resistance

• No gravity setting

• Friction slider set to maximum

• Friction slider set to zero

Tags

CCSS.8.EE.C.7B

What should be recorded at the peak of the ramp in the frictionless case?

• Kinetic energy

• Total mass of the skater

• Color of the skater's outfit

• Potential energy

How is potential energy at the starting point calculated?

• PE = mgh

• PE = mv^2

• PE = 1/2 mv^2

• PE = mg^2h

What happens to the mechanical energy in a frictionless system according to the lab manual?

• It is conserved

• It increases due to external forces

• It decreases over time

• It is not affected by motion

What is the correct expression for kinetic energy at the highest point?

• KE = mv

• KE = mgh

• KE = 1/2 mv^2

• KE = 2mv^2

In the presence of friction, how does the kinetic energy at the peak compare to the initial potential energy?

• It is less than the initial potential energy

• It is greater than the initial potential energy

• It becomes zero

• It remains unchanged

What is the simplified formula for kinetic energy derived from the conservation of mechanical energy?

• KE = v / 2

• KE = v^2

• KE = 2v

• KE = v^2 / 2

Tags

CCSS.8.EE.A.2

What additional tool is used in Part 2 to measure the skater's maximum velocity?

• Barometer

• Speedometer

• Altimeter

• Thermometer

How many Joules of energy does it take Science Steve to move a 2 kg box from the ground to the top of a set of stairs that is 3 meters tall?

Mathematical Equivalence

ON

Answer explanation

Change in potential energy. The final energy can be found using PE = mgh while the starting PE = 0 J

Tags

CCSS.8.EE.C.7B