7th Grade 1st Semester Final Exam Part 2

How does kinetic energy relate to stopping an object in motion?

• a. Less kinetic energy requires more force to stop
• b. Kinetic energy doesn't affect stopping force
• c. More kinetic energy requires more force to stop
• d. Stopping force is unrelated to motion

Tags

NGSS.HS-PS3-1

How does air resistance affect energy transfer?

• a. It has no effect on energy transfer
• b. It transfers energy between objects and air particles
• c. It only affects objects at rest
• d. It creates more energy

Tags

NGSS.HS-PS2-1

What is the mathematical relationship between kinetic energy and speed?

• a. Kinetic energy equals speed
• b. Kinetic energy is inversely related to speed
• c. Speed has no effect on kinetic energy
• d. Kinetic energy is proportional to speed squared

What is gravitational potential energy?

• Energy an object has due to its motion
• Energy an object has due to its position in a gravitational field
• Energy that is lost when an object falls
• Energy that only exists at ground level

Tags

NGSS.MS-PS3-2

If you lift a 2 kg book from the floor to a shelf that's 1.5 meters high, what happens to its gravitational potential energy?

• It remains the same
• It decreases
• It increases
• It becomes negative

Tags

NGSS.MS-PS3-2

The formula for gravitational potential energy is PE=mgh. What does 'g' represent in this formula?

• Gravity's constant
• Ground level
• Gradient of the slope
• Growth rate of energy

Tags

NGSS.MS-PS3-2

A ball has more gravitational potential energy when it is:

• Moving faster
• At room temperature
• At sea level
• Higher above the ground

Tags

NGSS.MS-PS3-2

Which statement about force and acceleration is correct?

• a. Force and acceleration are unrelated
• b. More force causes less acceleration
• c. Force has no effect on speed
• d. More force causes more acceleration

Tags

NGSS.HS-PS2-1

What makes certain materials better at protecting objects during impact?

• a. Their ability to deform under force
• b. Their complete rigidity
• c. Their smooth surface only
• d. Their weight alone

Tags

NGSS.HS-PS2-3

How does air resistance affect a moving object?

• a. It increases the object's speed
• b. It applies a force in the direction of motion
• c. It has no effect on the object
• d. It opposes the object's motion