A small ball of mass 0.2 kg starts motion from rest at A by means of a compressed
spring with compression 0.5 m and spring constant k as shown in Fig.1 to move on a
rough horizontal plane
µk =0.4 and passes by point B to start motion inside a smooth tube until it reaches C
to move as a projectile and finally enters the shown net at D.
a) Study the motion of the ball as a projectile and determine VC.
b) Applying the principle of work and energy and deduced the value of the spring
constant k.