🔭 physics

1. **Problem Statement:** Find the moment about point M for the rectangle ABCD inscribed in a circle of diameter 10 cm.

1. **பிரச்சினையை விளக்குதல்:** ஒருவர் தனது வீட்டிலிருந்து சேவை நிலையத்திற்குச் செல்லும் போது, தூரம் மற்றும் நேரம் கொடுக்கப்பட்டுள்ளன. இதன் அடிப்படையில் சராசரி வேகத்தை $\text{kmh}^{

1. **Problem Statement:** We are given a radioactive substance with a half-life of 1 week. Starting with 70 grams, we want to find how much remains after 3 weeks. 2. **Formula:** T

1. **Problem Statement:** We are given a radioactive substance with a half-life of 3 months. Starting with 50 grams, we want to find how much remains after 12 months. 2. **Formula:

1. **State the problem:** A train passes a station 120 m long at a speed of 180 km/h and takes 7 seconds to pass completely. We need to find the length of the train. 2. **Formula a

1. The problem is to define the term "physics."\n\n2. Physics is the branch of science concerned with the nature and properties of matter and energy.\n\n3. It studies phenomena suc

1. **Problem statement:** We analyze a bullet of mass $m=20\,g=0.02\,kg$ fired with velocity $V_0$ embedding into a wooden block of mass $M=1\,kg$ suspended by a string of length $

1. **Problem statement:** A tennis ball is dropped from a ceiling height $h_0=10$ m. Each bounce reaches 80% of the previous height. The time for a full bounce (up and down) from h

1. **Problem statement:** A tennis ball is dropped from a height $h_0=10$ m. Each bounce reaches 80% of the previous height. The time for a full bounce (up and down) from height $h

1. **Problem Statement:** Determine how many full bounces a ball makes within 20 seconds, given it bounces to 80% of its previous height each time and the initial drop height is 10

1. **Problem:** An airplane travels 2.5 hours at 300 mph, then turns 20° left and flies 1 hour at the same speed. Find the distance from the departure point. 2. **Formula:** Use ve

1. **State the problem:** We want to find how much of a radioactive substance remains after 12 months if its half-life is 3 months and the initial amount is 50 grams. 2. **Formula

1. **Problem:** A metal sphere contains $3.5 \times 10^{16}$ excess electrons. Find the net charge of the sphere. 2. **Formula:** The charge of one electron is $e = -1.6 \times 10^

1. **Problem statement:** A stone is thrown vertically upward with an initial velocity of $40\,ms^{-1}$ near the surface of a planet where gravitational acceleration is $8\,ms^{-2}

1. Let's clarify the concept of moment (torque) about a point. 2. The moment of a force about a point is defined as the force multiplied by the perpendicular distance from the poin

1. **Problem:** Calculate the new total weight of the ship after adding 10,000 kg. Formula: $$W_{total} = W + W_{add}$$

1. **Problem:** Calculate the new total weight of the ship after adding 10,000 kg. Given:

1. **Problem statement:** A mini bus of mass 2500 kg traveling at 40 m/s collides head-on with a lorry of mass 3500 kg moving at 20 m/s. After collision, the lorry moves at 1.2 m/s

1. **State the problem:** A 5 kg block is pushed 3 m across a horizontal floor by a 25 N force at an angle of 30° above the horizontal. The coefficient of kinetic friction is 0.2.

1. Problem 1: Given $L=0.50$ m, $q_1 q_2=8.0 \times 10^{-9}$ C, and angle $6^\circ$, find the distance and the electric force $F_E$. 2. Formula: Coulomb's law for electric force is

1. **Problem statement:** Calculate the total power dissipated in the circuit with resistors $R_1=10\ \Omega$, $R_2=3\ \Omega$, $R_3=8\ \Omega$ and voltage sources $V_1=5\ V$, $V_2