A2.00-kg, frictionless block is attached to an ideal spring with force constant 300 n/m. at t=0 the block has velocity -4.00 m/s and displacement +0.200 m.
find:
(a) the amplitude and (b) the phase angle.
c) write an equation for the position as a function of time.
assume x(t) in meters and t in seconds

14. a body is projected with velocity vi from a.at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.

State the below theories and give the name of the writer of the theory 1. wave theory 2. quantum theory 3. corpuscular theory 4. electromagnetic theory