68C661E3-C171-4D84-B521-9E3F0AF5B259

wol| | __________ [ Eopy#Find Selectio_l’ ranslate* 3. [@ In a room that is 2.44 m high, a spring (unstrained length = 0.30 m) hangs from the ceiling. A board whose length is 1.98 m 1s attached to the free end of the spring. The board hangs straight down, so that its 1.98-m length 1s perpendicular to the floor. The weight of the board (104 N) stretches the spring so that the lower end of the board just extends to, but does not touch, the floor. What is the spring constant of the spring? 4. @ (@) A spring lies on a horizontal table, and the left end of the spring is attached to a wall. The other end 1s connected to a box. The box 1s pulled to the right, stretching the spring. Static friction exists between the box and the table, so when the spring 1s stretched only by a small amount and the box 1s released, the box does not move. The mass of the box 15 0.80 kg, and the spring has a spring constant of 59 N/m. The coefhicient of static friction between the box and the table on which it rests is us = 0.74. How far can the spring be stretched from its unstrained position without the box moving when it is released? 5. @ E& A person who weighs 670 N steps onto a spring scale in the bathroom, and the spring compresses by 0.79 cm. (a) What 1s the spring constant? (b) What 1s the weight of another person who compresses the spring by 0.34 cm? 6. [@ A spring (k = 830 N/m) is hanging from the ceiling of an alaxmtar and a R N_la nhiect 10 attarhad ta the lauwer and Bxr