What does Newton's Second Law express?

Force equals mass times acceleration

What is the role of a lever?

Lifts heavy objects with effort

Which is a characteristic of conductors?

Allow electricity to flow easily

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2025 Finals Physics Challenge

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Put your physics knowledge to the test with questions ranging from Newton's laws to energy and electricity concepts.

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Questions 17

Answers

1
Which describes balanced forces?
Change motion of objects
Act in the same direction
Always cause acceleration
Do not change motion
2
What is the formula for kinetic energy?
KE = m/a
KE = mv
KE = mgh
KE = 1/2 mv²
3
What does a horizontal line on a distance-time graph indicate?
Object is speeding up
Object is at rest
Object is moving
Object is accelerating
4
What does Newton's Second Law express?
Force equals mass times acceleration
Speed equals mass times force
Acceleration equals force times mass
Mass equals force divided by speed
5
What does frequency measure?
Speed of a wave
Distance between waves
Number of waves per time
Height of a wave
6
What is the role of a lever?
Increases speed of objects
Lifts heavy objects with effort
Decreases weight of objects
Changes direction of force only
7
What happens to magnetic field strength with distance?
Increases with distance
Remains constant
Fluctuates randomly
Decreases with distance
8
What is the purpose of indicators like litmus paper?
Indicate acidity or basicity
Measure temperature
Determine color only
Calculate mass
9
What is the effect of unbalanced forces?
Always causes rest
No change in motion
Change in motion occurs
Only affects speed
10
True or false: An object in motion stays in motion.
False
True
11
What is potential energy dependent on?
Mass and height
Color and shape
Temperature and pressure
Speed and direction
12
True or false: AC current flows in one direction.
False
True
13
True or false: Electromagnets are created by electric current.
False
True
14
What is the pH of pure water?
Around 5
Exactly 7
Greater than 7
Less than 7
15
What is an example of a simple machine?
Chemical reaction
Sound wave
Electric circuit
Inclined plane
16
Which is a characteristic of conductors?
Only work with AC current
Do not allow electricity flow
Have high resistance
Allow electricity to flow easily
17
What happens in a neutralization reaction?
Creates only water
Forms gas and liquid
Releases heat only
Produces salt and water

2025 Finals Physics Challenge Flashcards | StudBud