A block of mass m = 1.9 kg is attached to a spring of force constant 500 N/m. The assembly lies on a horizontal frictionless surface. The block is pulled 7.0 cm to the right of equilibrium. What was the work required to stretch the spring?

The small 0.25-kg slider is known to move from position A to position B along the vertical-plane slot. Determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. The distance R = 0.83 m, the spring modulus k = 157 N/m, and the unstretched length of the spring is 0.61 m. B R 3 Answers: 0 k A (a) Work done on the body by its weight: Ug (b) Work done on the body by the spring: Us

A spring is stretched by 11.5cm. If the spring constant of the spring is 72.8N/m. How much elastic potential energy (in unit of joule) is stored in the spring?

A 0.293-kg block resting on a frictionless, horizontal surface is attached to a spring having force constant 83.8 N/m as in the figure below. A horizontal force F causes the spring to stretch at a distance of 5.02 cm from its equilibrium position. www (a) Find the value of F. (Enter the magnitude of the force only.) (b) What is the total energy stored in the system when the spring is stretched? (c) Find the magnitude of the acceleration of the block immediately after the applied force is removed. m/s2 (d) Find the speed of the block when it first reaches the equilibrium position. m/s

A spring that obeys Hooke's law is hung in a vertical orientation. The spring is stretched a total of 6.0 cm from its equilibrium length when a 2.0 kg mass hangs from it. The spring, mass system is then pulled downward by an external force which lengthens the spring an additional 10cm. While the spring is being extended what is the work done by the spring?

A block of mass 3.20 kg is placed against a horizontal spring of constant k = 745 N/m and pushed so the spring compresses by 0.0550 m. (a) What is the elastic potential energy of the block-spring system (in J)? (b) If the block is now released and the surface is frictionless, calculate the block's speed (in m/s) after leaving the spring.

A cart of mass 0.350 kg is attached to the end of a spring, with force constant 55.0 N/m, on a friction less track. Initially the spring is unstretched when the cart is moving to the right at a speed of 1.75 m/s. How far is the cart able to stretch the spring in centimeters (cm)? Your Answer: Answer units

A block of mass m = 2.00 kg is attached to a spring of force constant k = 4.35 x 102 N/m that lies on a horizontal frictionless surface as shown in the figure below. The block is pulled to a position x, = 5.10 cm to the right of equilibrlum and released from rest. x= 0 x= x, (a) Find the the work reguired to stretch the spring. (b) Find the speed the block has as it passes through equilibrium. m/s

When a 4.00-kg object is hung vertically on a certain light spring that obeys Hooke’s law, the spring stretches 2.50 cm. If the 4.00-kg object is removed, (a) how far will the spring stretch if a 1.50-kg block is hung on it? (b) How much work must an external agent do to stretch the same spring4.00 cm from its unstretched position? Answer :  (a) 472 J (b) 2.76 kN

A block of mass 3.8 kg is placed against a horizontal spring of constant k = 735 N/m and pushed so the spring compresses by 0.0550 m.   (a)What is the elastic potential energy of the block-spring system (in J)? (b) If the block is now released and the surface is frictionless, calculate the block's speed (in m/s) after leaving the spring.