A horizontal spring with force constant k = 665 N/m is attached to a wall at one end and to a block of mass m = 2.35 kg at the other end that rests on a horizontal surface. The block is released from rest from a position 4.30 cm beyond the spring's equilibrium position. (a) If the surface is frictionless, what is the speed of the block as it passes through the equilibrium position? m/s (b) If the surface is rough and the coefficient of kinetic friction between the box and the surface is ?k = 0.300, what is the speed of the block as it passes through the equilibrium position? m/s

A 400-g ball is thrown vertically upward at 2.0 m / s from a position that is 80 cm on a vertical spring resting on the floor. The ball rises first and then falls on the spring, whose spring constant is 400 N / m. Calculate (a) the speed of the ball as it touches the spring; (b) the maximum compression that the compressed spring undergoes by the ball. Neglect friction with air

:) A spring with a constant k = 100 N/m is placed after point-C in the frictionless ABC path. A ball of mass of 2 kg is initially at rest and released from point A. The ball travels through the ABC path and finally hits the spring. a) What is the velocity of the ball at point B and C? b) What is the maximum compression in the spring? 22 kg 1.8 m 0.45 m g=9.8 m/s?

The fair is in town and one of the attractions is a bungee jump. They are trying to determine the safety restrictions to prevent an accident. The length of the cord is 6.3m. The maximum distance of the fall is H=31 m, and the spring constant is K=145N/m. Given this information, what is the largest mass of jumper this attraction can allow?

A block of mass 3.40 kg is placed against a horizontal spring of constant k = 855 N/m and pushed so the spring compresses by 0.0650 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 massless spring of spring constant k = 4307 N/m is connected to a mass m = 105 kg at rest on a horizontal, frictionless surface. Part (a) The mass is displaced from equilibrium by A = 0.81 m along the spring's axis. How much potential energy, in joules, is stored in the spring as a result? Part (b) When the mass is released from rest at the displacement A= 0.81 m, how much time, in seconds, is required for it to reach its maximum kinetic energy for the first time? Part (c) The typical amount of energy released when burning one barrel of crude oil is called the barrel of oil equivalent (BOE) and is equal to 1 |BOE = 6.1178362 GJ. Calculate the number, N, of springs with spring constant k = 4307 N/m displaced to A = 0.81 m you would need to store 1 BOE of potential energy. Part (d) Imagine that the N springs from part (c) are released from rest simultaneously. If the potential energy stored in the springs is fully converted to kinetic energy and thereby "released" when the attached…

As shown in the figure, a 1.50 kg box is held at rest against a spring with a force constant k = 725 N/m that is compressed a distance d. When the box is released, it slides across a surface that is frictionless, except for a rough patch that has a coefficient of kinetic friction μk = 0.47 and is 6.0 cm in length. (a) Calculate the spring's potential energy in terms of d  d2 (b) Calculate the magnitude of the friction force (in N).  N (c) Calculate the work done by the frictional force (in J). Be sure to include the correct sign in your answer.  J (d) The speed of the box is 1.9 m/s after sliding across the rough patch. Calculate the initial compression d (in cm) of the spring.  cm

A 0.25 kg mass is placed on a vertically oriented spring that is stretched 0.56 meters from its equilibrium position. If the spring constant is 105 N/m, how fast will the mass be moving when it reaches the equilibrium position? Hint: You cannot ignore the change in gravitational potential energy in this problem. Please give you’re answer in m/s.

A block of mass 2.00 kg is placed against a horizontal spring of constant k = 765 N/m and pushed so the spring compresses by 0.0650 m. HINT (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. m/s

A block of mass m = 2.00 kg is attached to a spring of force constantk = 5.30 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, = 4.80 cm to the right of equilibrium and released from rest. k m x= 0 x= x; (a) Find the the work required to stretch the spring. (b) Find the speed the block has as it passes through equilibrium. m/s