2) By saying that the electrostatic field is conservative, we do not mean that All Choices Are Wrong The potential difference between any two points is zero. lts circulation is identically zero. Its curl is identically zero. It is the gradient of a scalar potential.

14 If velocity, momentum and kinetic energy of a particle are represented by \( v, p \) and \( k \) respectively then, which relation is correct ? \( \begin{array}{ll}\text { (1) } p=\frac{d k}{d v} & \text { (2) } p=\frac{d k}{d t} \\ \text { (3) } p=\frac{d v}{d t} & \text { (4) } p=\left(\frac{d k}{d v}\right)\left(\frac{d k}{d t}\right) \\ \text { यदि } \nu, p \text { और } k \text { क्रमशः कण के वेग, संवेग और गतिज ऊर्जा हैं तो निम्न में से } \\ \text { कौन-सा सम्बन्ध सही है ? } \\ \begin{array}{ll}\text { (1) } p=\frac{d k}{d v} & \text { (2) } p=\frac{d k}{d t}\end{array}\end{array} \).

2. एक ही दिशा में चल रहे दो रेल इंजन जिनका वज़न 120 kN व 100 kN हैं, टकराने के पश्चात् एक साथ आगे बढ़ते हैं । टक्कर के पश्चात् समान गति (speed) होगी \( \begin{array}{ll}\text { (1) } 3.8 \mathrm{~m} / \mathrm{s} & \text { (2) } 3.9 \mathrm{~m} / \mathrm{s} \\ \text { (3) } 4.0 \mathrm{~m} / \mathrm{s} & \text { (4) } 4.1 \mathrm{~m} / \mathrm{s}\end{array} \)

Соорость материапьной точки А задается выражением: \( v(t)=1,4 \cdot t^{2}+7 t \mathrm{~m} / \mathrm{c} \). Чему равно тангенциальное ускорение черсз 2 с после наиала движе

Условие заданИя: точка, совершающая механические колебания, проходит за 2 полных колебания путь, равный 62 см. Определи амплитуду колебаний точки. (Ответ окрудлидо челых.)

If the component vector \( \vec{A} \) along the direction of vector \( \vec{B} \) is zero, what can you conclude abot the vectors? a) Is it possible to add a vector quantity to a scalar quantity? Explain b) Can the magnitude of a vector have a negative value? Explain Which of the following physical quantities are vector \& which are not: force, temperature, th volume of water in a can, the ratings of a TV show, the height of a building, the velocity of