14-79. The vertical guide is smooth and the 5-kg collar is released from rest at A. Determine the speed of the collar when it is at position C. The spring has an unstretched length of 300 mm. 0.4 m A k = 250 N/m 0.3 m C
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- -232. A 10.0-kg block is released from rest at a rough 5.0 m long 30° incline. The coefficient of kinetic friction between incline and box is 0.2. At the bottom of the incline is a frictionless flat track. The block travels down the track, hits a spring of force constant k = 100 N/m. Determine (a) the speed of the block at the bottom of the incline, (b) the maximum compressing distance of the spring from its equilibrium position. (25) 30° spring7) A 5.00 ✕ 105 kg subway train is brought to a stop from a speed of 0.500 m/s in 0.300 m by a large spring bumper at the end of its track. What is the force constant k of the spring (in N/m)? _____ N/m
- A box with mass m=3.0 kg is attached to the lower end of a relaxed vertical spring of force constant k=300N/m , then released. The speed of the basket after it has fallen 15 cm is what? 1— 0.83m/s 2— 1.5m/s 3— 1.7 m/s 4—2.3 m/s 5— 5.7m/s(1) It is weigh-in time for the local under-85-kg rugby team. The bathroom scale used to assess eligibility can be described by Hooke's law and is depressed 0.66 cm by its maximum load of 115 kg. (a) What is the spring's effective spring constant (in N/m)? N/m One type of BB gun uses a spring-driven plunger to blow the BB from its barrel. (b) Calculate the force constant (in N/m) of its plunger's spring if you must compress it 0.170 m to drive the 0.0520 kg plunger to a top speed of 24.0 m/s. in N/m (c) What force (in N) must be exerted to compress the spring? (Enter the magnitude.) in N1) A pendulum bob of mass 0.710 kg is suspended by a string of length 1.50 m. The bob is released from rest when the string is at 30°to the vertical. The swing is interrupted by a peg 1.00 m vertically below the support as shown below. What is the maximum angle to the vertical made by the string after it hits the peg? 1 m
- 3 E C 7. When a 0.38-kg block is suspended on a vertical spring, it causes it to stretch 3.30 cm. If the block is now pulled 8.50 cm below its equilibrium position and released, what is the speed of the block when it is 4.00 cm below the equilibrium position? R 22 WEB 5 V T FG B m/s tv 6: MacBook Air 7 Y JU H N 44 U J 8 M DI | MOSISO ( 9 K O I ) O command P Л r zoom + option ISOIT P y m 04 M vanies of the auffer d deleteQ4:A smooth 5 kg collar shown in fig 1, fits loosely on the vertical shaft. if the spring is unstrched when the collar is in the position A, determine the speed at which the collar is moving when y=1m ,if (a) it is released from rest at A and (b)it is released at A with an upwared velocity Va=6m/s. 0.75 m www k-3N/m (a) Figure 1.A 1-kg mass attached to a vertical spring of constant 200 N/m is released from an unstretched positions of the spring. What is the maximum stretch in the spring as the object gets to its lowest position? O 0.1 m O 0.3 m O 0.4 m O 0.2 m O None of these