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.

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

? (What is free fall?) (What is gravity?)

A bullet of mass 120 grams is fired into a target of mass 10 kg with velocity \( 400 \mathrm{~m} / \mathrm{s} \). If the target is free to move, the loss of kinetic energy would be approximately \( \begin{array}{ll}\text { (1) } 9.5 \mathrm{kNm} & \text { (2) } 4.75 \mathrm{kNm} \\ \text { (3) } 19 \mathrm{kNm} & \text { (4) } 0\end{array} \)

6. A particle undergoes three consecutive displacements: \( \bar{d}_{1}=(15 i+30 j+12 k) \mathrm{cm} \). \( \vec{d}_{2}=(23 i-14 j-5 k) a n \) and \( \vec{d}_{3}=(-13 i+15 j) \) an Find the magnitude of the resultant displacement.

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