Topic 2 quiz

Which of the following graphs correctly represents the relationship between the mass of an object and its kinetic energy, assuming the speed is constant?

• A linear graph passing through the origin

• A parabolic graph opening upwards

• A horizontal line

• A vertical line

Tags

NGSS.MS-PS3-1

Develop a model to describe how the potential energy changes when two magnets are moved closer together. Which of the following statements is true?

• Potential energy increases as the magnets move closer.

• Potential energy decreases as the magnets move closer.

• Potential energy remains constant as the magnets move closer.

• Potential energy first increases, then decreases as the magnets move closer.

Tags

NGSS.MS-PS3-2

A 2 kg object is moving at a speed of 3 m/s. Construct a graph to show the relationship between the kinetic energy and the speed of the object. What is the kinetic energy of the object at this speed?

• 3 J

• 9 J

• 18 J

• 27 J

Tags

NGSS.MS-PS3-1

• 20 J

• 40 J

• 80 J

• 160 J

Tags

NGSS.MS-PS3-1

A ball is held at a height of 10 meters and then dropped. Develop a model to describe the change in potential energy as it falls. What happens to the potential energy?

• It increases as the ball falls.

• It decreases as the ball falls.

• It remains constant as the ball falls.

• It first increases, then decreases as the ball falls.

Tags

NGSS.MS-PS3-2

A 3 kg object is moving at a speed of 5 m/s. Calculate its kinetic energy.

• 15 J

• 25 J

• 37.5 J

• 75 J

Tags

NGSS.MS-PS3-1

The law of ​ (a)   states that energy in a system can change forms but can never be created or destroyed.

• conservation of energy
• consecration of energy
• conversion of energy
• construction of energy

Tags

Conservation of Energy

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy? 

• The PE and KE increase and decrease together
• The PE decreases while the KE increases 
• Impossible to know without knowing the mass  

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

When a spring is compressed, what happens to its potential energy?

• Potential energy remains constant.

• Potential energy decreases.

• Potential energy increases.

• Potential energy first decreases, then increases.

Select the bowling ball that has LESS kinetic energy