52 Un aereo deve distribuire dei pacchi di soccorso agli abitanti di un villaggio, mentre sta volando a \( 300 \mathrm{~km} / \mathrm{h} \) a una quota di \( 95,0 \mathrm{~m} \) da terra. A che distanza, in senso orizzontale, dal villaggio deve sganciare il suo carico, affinché cada esattamente sull'obiettivo?

A 1 km long goods train is running at a speed of 45 \( \mathrm{~km} / \mathrm{h} \). The time taken by this goods train to pass through a 2 km long tunnel is : \( \begin{array}{ll}\text { (A) } 1 \text { minute } & \text { (B) } 2 \text { minutes } \\ \text { (C) } 3 \text { minutes } & \text { (D) } 4 \text { minutes }\end{array} \)

Sebuah mobil bermassa 1200 kg bergerak dengan kecepatan \( 20 \mathrm{~m} / \mathrm{s} \). Mobil tersebut kemudian direm hingga berhenti setelah menempuh jarak 50 meter. Berapakah gaya pengereman yang bekerja pada mobil tersebut?

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

train moving at an average speed of \( 72 \mathrm{~km} / \mathrm{h} \) takes 15 seconds to completely cross a ridge that is 80 metres long a) Express \( 72 \mathrm{~km} / \mathrm{h} \) in metres per second b) Find the length of the train in metres