Physics General Relativity Study guides, Class notes & Summaries
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PHY 102 Exam 4 2024/2025 VERIFIED AND UPDATED VERSION
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PHY 102 Exam 4 2024/2025 VERIFIED AND UPDATED VERSION 
charge flows into a - √√closed circuit 
P = - √√IV 
V = - √√IR 
On some early automobiles both headlights went out when one bulb burned out. The headlights must have been connected in - √√a series circuit 
current is measured in - √√ampere (amps) 
The power dissipated in each of two light bulbs is the same. The potential across light bulb A is twice that of light bulb B. If the resistance of light bulb B is R, what is the...
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Physics Practice Exam Questions and Answers 2024
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If I am standing on a bathroom scale in an elevator that is freely falling at g=10 m/s^2, then the 
reading on the scale will be ______ - zero bc of weightlessness. 
 If no external forces are acting on a moving object, it will ______ - continue moving at the 
same velocity 
 A horse gallops a distance of 15 kilometers in a time of 30 minutes. Its average speed is ____ - 
20 km/hr 
 Your pet hamster sits on a record player whose angular speed is constant. If he moves to a point 
twice as far...
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Physics Final Exam Study Guide for 2024
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Displacement - distance and direction of an object's change in position from the starting point 
distance - how far an object moves 
balanced forces - forces that are equal in size and opposite in direction; they do not move an object 
and the net force is equal to zero. 
average speed - total distance divided by total time 
instantaneous speed - speed at a given point in time 
unbalanced forces - forces that are unequal in size and the direction is the same; they cause an 
object to move 
ve...
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Physics Final Exam Review Questions with complete solutions
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Inertia in motion; an object in motion wants to stay in motion in a straight line - momentum 
 What does momentum depend on? - mass and velocity 
 How is momentum related mass and velocity? - directly to both 
 Which has a greater mass- a heavy truck at rest or a a rolling skateboard? Which has greater 
momentum? - heavy truck; rolling skateboard 
 Is momentum always constant? - yes, if velocity is constant 
 What would make an object's momentum change? - if an object accelerates 
 when a for...
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Physics Final Exam Review Questions and Answers 2024
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A force is needed to - change an objects state of motion 
The combination of all forces acting on an object is called the - net force 
When you hold a rock at rest in your hand, you are pushing upward on it with as much force as Earth's 
gravity pulls down on it. The net force would be - zero on the rock 
The scientific unit of force is the newton-- - abbreviated N 
Tension is a - stretching force 
Weight is the force of gravity - acting downward on an object 
A vector is an arrow that - repre...
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Physics Final Exam 2024 Questions with complete solutions
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When you push against a wall with your fingers, they bend because they experience a force. Identify this 
force? - Opposite force 
A boxer can't hit a heavy bag with great force. Why can't he hit a piece of tissue paper in midair with the 
same amount of force? - Doesn't have resistance 
How many forces are required for an interaction? - Two 
One end of the rope is pulled with 100 N, while the opposite end is pulled with 100N. The tension in the 
rope is what? - 100 N 
A piece of rope is p...
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Physics Exam (Summer School) practice Question and Answers
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What causes a moving object to keep on course? - Inertia 
What force exists between objects even in the absence of direct physical contact? - Field Force 
In the free-body diagram shown above showing a motorcycle, what can you say is happening? - The 
person is slowing down 
In the free-body diagram show above, the F N force represents... - The support force of ground on 
According to Newton's second law, when the same force is applied to two objects of different masses, 
the lighter mass wil...
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Physics Exam Revision Questions and Answers
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1. When does conservation of energy apply? - Always 
2. The conservation of energy - ____________ is a fundamental concept of physics along with 
the conservation of mass and the conservation of momentum. Within some problem domain, 
the amount of energy remains constant and energy is neither created nor destroyed. 
3. A rock is perched at the very edge of the top of a very high cliff ready to fall any minute. What 
kind of energy does it have? - Potential Energy 
4. If the rock isn't moving...
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Physics Exam Review Summary Question with complete solutions
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Friction - The force that always opposes motion 
Coefficient of friction - Force of friction divided by normal force 
Net force - Resultant force, the sum of all forces acting on an object 
Free body diagrams - Physical model of a representation of forces acting on a system 
2-dimensional motion - Any motion of an object is more than one line, a plane 
Vector independence - Changes in one vector do not cause changes in another 
Projectile - Any object launched into the air with no force other th...
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Physics Exam Review Questions with Complete soulutions
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B - A cart rolls down inclined track and is accelerating. It fires a ball straight out of the cannon as it 
moves. What happens to the ball? 
A.) It falls in front of the cart 
B.) It falls right back into the cart 
C.) It falls behind the cart 
C - You drop a package from a plane flying at constant speed in a straight line. Without air resistance, 
what will the package do? 
A.) Remain vertically behind the plane 
B.) Remain vertically in front on the plane 
C.) Remain vertically under plane...
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