A crate of mass 2 kg is being lifted by a force described as F = 2s +25 where s is displacement in meters. What is the velocity after the crate is lifted 11 m (s = 11 m)? m

The acceleration of an object is proportional to its velocity O its mass its position its displacement O the net force acting on it

Pr1. A body of mass m = a vertical spring of spring constant k = 90 N/m. At t = 0 the body is displaced from its equilibri- um position downward by distance xo and it is given an initial velocity vo = 2,50 kg is hung on 13 cm 78 cm/s also directed downwards. a) Give the displacement x(t) of the body as a function of time. After how much time does the body pass through the equilibrium position first? b) Find the maximal displacement, speed and acceleration of the body during the motion. c) Find the total energy stored in the oscil- lation.

A rigid ball of weight 100 N is suspended with the help of a string. The ball is pulled by a horizontal force F such that the string makes an angle of 30° with the vertical. The magnitude of force F (in N) is i30° F 100 N