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Home Question Bank Physics Archive 2025 January 01

Physics Questions from Jan 01,2025

Browse the Physics Q&A Archive for Jan 01,2025, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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Descomposición de un vector en dos vectores ortogonales \( \mathbf{u}=-6 \mathbf{i}+4 \mathbf{j} \) y sea \( \mathbf{v}=-4 \mathbf{i}-2 \mathbf{j} \). Descomponer \( \mathbf{u} \) en dos vectores \( \mathbf{u}_{\mathbf{1}} \) y \( \mathbf{u}_{\mathbf{2}} \), donde \( \mathbf{u}_{\mathbf{1}} \) es paralelo a \( \mathbf{v} \) y \( \mathbf{u}_{\mathbf{2}} \) es ortogonal \( \mathbf{u}_{\mathbf{1}}=\square \) cribir sus respuestas en la forma \( a \mathbf{i}+b \mathbf{j} \). - 1. A 2000 kg loaded coal cart is pulled up at an angle \( 10^{\circ} \) inclined at a constant speed by the cable parallel to the incline. The frictional force impeding the motion is 800 N . How much work is done on the cart by the cable as the cart is pulled 30 m . Use \( g=9.81 \mathrm{~ms} \). - 1. A 2000 kg loaded coal cart is pulled up at an angle \( 10^{\circ} \) inclined at a constant speed by the cable parallel to the incline. The frictional force impeding the motion is 800 N . How much work is done on the cart by the cable as the cart is pulled 30 m . Use \( g=9.81 \mathrm{~ms} \). 1. A 2000 kg loaded coal cart is pulled up at an angle \( 10^{\circ} \) inclined at a constant speed by the cable parallel to the incline. The frictional force impeding the motion is 800 N . How much work is done on the cart by the cable as the cart is pulled 30 m . Use \( g=9.81 \mathrm{~ms} \). A 2000 kg loaded coal cart is pulled up at an angle \( 10^{\circ} \) inclined at a onstant speed by the cable parallel to the incline. The frictional forc mpeding the motion is 800 N . How much work is done on the cart by he cable as the cart is pulled 30 m . Use \( g=9.81 \mathrm{~ms} \). A 2 kg object is dropped from the height of 12 m and is moving at ms \( \square \) just before hitting the ground. How large is the average rictional force retarding the motion. Use \( g=9.81 \mathrm{~m} / \mathrm{s} 2 \) Una barra di rame è lunga \( 5,50 \mathrm{~m} \) alla temperatura di \( 20,0^{\circ} \mathrm{C} \). La barra viene messa in una fornace e si al- lunga di \( 3,50 \mathrm{~cm} \). C Calcola la temperatura della fornace. प्रश्नावली I (a) (a) यदि कोई कण एक सरल रेखा में चले और उसकी गति \( x^{2}=a t^{2}+2 b t+c \) द्वारा दी जाये,तो सिद्व करो कि उसका त्वरण \( x^{3} \) के व्युत्कमानुपाती होगा। If a particle is moving along a straight line and its velocity is given by \( x^{2}=a t^{2}+2 b t+c \), then prove that the anceleration is inversely proportional to \( x^{3} \) 2) placer chaque unité devant la grandeur physique qui convient : \( \mathbf{K g} / \mathrm{m}^{\prime} \) La pression \( \qquad \) Lat temperature \( \qquad \) la masse volumique 3) relie chaque grandeur physique avec son apparell de mesure. - La température را اتومبيل سبز x=0 اتوموبيل قرمز در|t=0 در قرار دارند x= 220m در در متر از كنار يكديگر عبور x=76.6 انهارا در : ميكنند الف) سرعت اوليه اتومبيل سبز چقدر است؟ ب) شتاب ثابت اتومبيل سبز چقدر است؟ 3. L'autocarro Per mantenere la velocità di \( 95 \mathrm{~km} / \mathrm{h} \), il motore di un au- tocarro di massa 1200 kg genera una forza di 580 N . Qua- li sono le componenti delle forze che agiscono sull'auto- carro, in un sistema di assi in cui l'asse \( x \) è positivo nella direzione del moto e l'asse \( u \) è positivo verso l'alto?
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