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🔭 physics

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Noise Level
1. **Problem Statement:** We need to find the equivalent noise level when five machines with noise levels A=90 dB, B=84 dB, C=97 dB, D=88 dB, and E=94 dB are all running together.
Ball Vertical Motion
1. **Problem statement:** A ball is thrown vertically with height given by the function $$y=16.6t-4.9t^2$$ meters after $$t$$ seconds. We need to find:
Car Velocity
1. **State the problem:** We have a car with initial velocity $u = 20$ m/s.
Velocity Time
1. **State the problem:** We are given the velocity function $$v = 82(1 - e^{-0.39t})$$ and asked to find the time $$t$$ when the velocity $$v$$ is 70 feet per second. 2. **Write t
Distance Between Vehicles
1. **State the problem:** A car and a van start moving from city K to city H at the same time.
Average Speed
1. **State the problem:** We want to find the average speed when given speed and time for different segments of a trip. 2. **Formula:** The average speed $v_{avg}$ is given by the
Distance From Speed Time
1. Let's state the problem: You are given speed and time, and you want to find the distance traveled. 2. The formula to find distance when speed and time are known is:
Average Speed
1. The problem is to find the average speed in kilometers per hour (km/h). 2. The formula for average speed is:
Physics Quiz
1. **Problem:** A car goes 6 km east and then 4 km north. Find its displacement. 2. **Formula:** Displacement in two dimensions is found using the Pythagorean theorem: $$d = \sqrt{
Work Lifting Sand
1. **Problem statement:** A bag of sand weighing 100 lbs is lifted to a height of 35 ft. The sand leaks out uniformly so that the bag is empty at 35 ft. We need to find the work do
Work Lifting Sand
1. **State the problem:** We have a bag of sand weighing 100 lbs initially, lifted to a height of 35 ft. The sand leaks uniformly so that the bag is empty at 35 ft. We want to find
Acceleration Problems
1. Problem: A cyclist accelerates from 15 km/h to 30 km/h over 1.3 km. Find acceleration $k$ in $ms^{-2}$. Step 1: Convert speeds to $ms^{-1}$.
Motion Intervals
1. مسئله اول: جسمی با شتاب ثابت و مثبت، با سرعت اولیه $v_0=70$ m/s در جهت محور $x$ حرکت می‌کند. مسافت‌های طی شده در بازه‌های زمانی $t_1=0$ تا $6$ ثانیه و $t_2=6$ تا $12$ ثانیه به ت
Work Force
1. **مسئله:** یک بیمار به جرم ۷۵ کیلوگرم روی تختی به جرم ۱۵ کیلوگرم قرار دارد. پرستار تخت را با نیروی افقی ثابت $F$ روی سطحی هموار و با اصطکاک ناچیز هل می‌دهد. مجموعه تخت و بیمار ا
Pump Efficiency
1. **Problem statement:** A pump with an input power of 20 horsepower pumps 70 liters of water per second to a height of 15 meters. The water density is 1000 kg/m³ and gravitationa
Acceleration Value
1. مسئله: نمودار شتاب-زمان یک متحرک روی خط راست داده شده است. شتاب متوسط متحرک در بازه زمانی $t_1=2s$ تا $t_2=12s$ برابر با $0.4\,m/s^2$ است. مقدار $a'$ بر حسب SI را بیابید. 2. فرم
Gravity Value
1. The problem states that the acceleration due to gravity is given as $g = 10 \text{ m/s}^2$. 2. This value is often used in physics problems involving free fall, projectile motio
Motion Problems
1. مسئله اول: خودرویی با سرعت ثابت 72 \(\frac{km}{h}\) حرکت می‌کند و پس از دیدن مانع، 0.4 ثانیه بعد با شتاب \(4 \frac{m}{s^2}\) ترمز می‌گیرد و با سرعت \(14.4 \frac{km}{h}\) به مانع
Motion Graph
1. مسئله: جسمی با سرعت ثابت بر روی مسیر مستقیم حرکت می‌کند. داده شده: $t_1=4s$, $x_1=6m$, $t_2=2s$, $x_2=46m$. باید نمودار مکان-زمان صحیح را پیدا کنیم. 2. فرمول سرعت ثابت: $$v=\fra
Work Kinetic Energy
1. **مسئله اول:** کار انجام‌شده توسط شخص روی گلوله برفی را محاسبه کنید. 2. داده‌ها: جرم گلوله برفی $m=150\,g=0.15\,kg$، ارتفاع $h=180\,cm=1.8\,m$، سرعت پرتاب $v=12\,m/s$، شتاب گران
Velocity Time
1. **Problem Statement:** We have a velocity-time graph where velocity $v$ (in m/s) starts at 32 m/s at $t=0$, remains constant until $t=8$ seconds, then decreases linearly to 0 m/