PHYs2310/2310H Worksheet Simple Harmonic Motion-Spring A 0.20 -kg block attached to an ideal massless spring with a force constant of \( k=20 \mathrm{~N} / \mathrm{m} \) is pulled at distance of 15 cm from the spring's equilibrium position. After the block is released at rest from there, the system undergoes simple harmonic motion. What is the speed of the block when it is 5.0 cm away from the system's equilibrium position?

Essay problem a body placed on rough horizontal level and two horizontal coplanar forces affected on it \( 6,10 \mathrm{~N} \) angle between them \( 60^{\circ} \) then the body's about to move if friction coefficient \( \frac{2}{3} \) then body weight \( =\ldots, \mathrm{N} \)

body hanging by two strings and equilibrium \( T_{2}=60 \mathrm{~N} \) then \( w=\cdots \mathrm{N} \)

b. Un moteur consomme \( x \) litres d'essence de masse volumique \( \rho \) et de pouvoir énergétique en \( h \) heures. 1. Quelle est la puissance \( P \) de ce moteur? 2. Trouverais-tu une valeur plus faible ou plus élevée si tu tenais compte des pertes d'énerg c. Un thermoplongeur de puissance \( P \) permet de chauffer une masse \( m \) de liquide de chaleul massique c de la température \( T_{1} \) à \( T_{2} \) en un temps \( t \). 1. Exprime la masse de liquide chauffée par ce thermoplongeur. 2. Exprime la température \( T_{2} \) du liquide.

3) if \( \overrightarrow{F_{1}}, \overrightarrow{F_{2}}, \overrightarrow{F_{3}} \) are 3 forces that meets at a point and equilibrium: then the resultant of \( \overrightarrow{F_{1}}, \overrightarrow{F_{2}} \) equal : \( \begin{array}{lll}\text { 1) } \overrightarrow{F_{1}}, & \text { 2) } \overrightarrow{F_{1}}+\overrightarrow{F_{2}} & \text { 3) } \overrightarrow{F_{3}}\end{array} \)

body placed on a rough horizontal level \( W=75 \mathrm{~N} \) horizontal force affected 50 N Makes it about to move en the coefficient of friction equals \( \begin{array}{llll}\text { 1) } \frac{1}{3} & \text { 2) } \frac{2}{3} & \text { 3) } \frac{3}{4} & \text { 4) } \frac{1}{4}\end{array} \)