1. If a spring has a spring constant k = 24 N/m, how far would you have to stretch the spring to store 55 Joules of potential energy

1a. A student does 125.0 J of work lifting a 12.0 kg book. How high was the book lifted? 1b.The book from problem 1 is then allowed to slide down a straight ramp which makesa 26.0o angle above the horizontal, and the book reaches its original position at the endof this ramp. How fast would it be going if there was no friction?

ignment Score: Give Up? 0% O Hint Resources Check Answer Press Esc to exit full screen estion 1 of 8 Pilings are driven into the ground at a building site by dropping a 1850 kg object onto them. What change in gravitational potential energy does the object undergo if it is released from rest 16.0 m above the ground and ends up 1.30 m above the ground? change in gravitational potential energy: J. bp 12 insert prt sc ho fe 144 f6 40 + backspace & 00 EGO %24

d) What is the applied force when the spring is compressed? e) What is the kinetic energy of the toy when it reaches its maximum height?

1. A roller-coaster car with a mass of 1200 kg starts at rest from a point 20 m above the ground. At point B, it is 9 m above the ground. [Express your answers in kilojoules (kJ).] a. What is the initial potential energy of the car? b. What is the potential energy at point B? c. If the initial kinetic energy was zero and the work done against friction between the starting point and point B is 40 000 J (40 kJ), what is the kinetic energy of the car at point B 2. The time required for one complete cycle of a mass oscillating at the end of a spring is 0.80 s. What is the frequency of oscillation?

Help please