An ideal spring is used to fire a 25.0 g pellet horizontally. The spring has a spring constant of k = 125 N/m and is initially compressed by x = 9.00 cm from its equilibrium position. What is the speed of the pellet as it leaves the spring? This is a positive number. Give your answer in m/s.

a. A 10.0 kg object has an initial velocity of (5.0i + 3.0j) m/s. What is its kinetic energy at this time? KE = ½ mv² where v² = V.V

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 m = 12.0 kg is pressed against a spring of spring constant k = 300 N/m, compressing itz = 10.0 cm. The box is released and is launched by the spring. Find the final speed of the box in meters per second. See the image attached for a representation.

A0.90 kg brick compresses a spring 0.35 meters at point A and the spring has a spring constant of 75 N/m. If the brick is launched from rest from point A, what is its velocity at point B? A ha = 0 hB = 0 VA = 0 Vв > 0 A 10.2 m/s B 3.20 m/s 46.8 m/s D 38.7 m/s O O O O

A 101-kg man is skiing across level ground at a speed of 9.5 m/s when he comes to the small slope 1.8 m higher than ground level shown in the following figure.   a. If the skier coasts up the hill, what is his speed when he reaches the top plateau? Assume friction between the snow and skis is negligible. b. What is his speed when he reaches the upper level if an 80-N frictional force acts on the skis?

A 2.05 kg rock is dropped onto a spring from a height of 0.411 m. If the spring constant is 1951 N/m, what is the maximum compression of the spring?

A 90-gram mass is placed on a vertically oriented spring that then is stretched 0.5 meters below its equilibrium position and released.  If the spring constant is 200 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 your answer in units of m/s, however, do not explicitly include units when typing your answer into the answer box.  Including actual units will result in your answer being incorrectly scored.

You have a spring of spring constant k, and a block of mass 0.200 kg. You set the spring up vertically and compress the spring 0.300 m. It launches the block up to a max height of 2.20 m. What is the spring constant?

A toy gun fires a 9.41 g projectile disc by using a compressed spring (k= 1720 N/m). The barrel of the gun is 13.1cm (this is measured after the spring). As soon as the projectile goes leaves the spring, it creates thermal energy due to friction. The frictional force is 0.130N. If you compress the spring 14.0mm, what is the speed of the projectile when it leaves the gun?