At point A in the figure shown below, a spring (spring constant k = 1000 N/m) is compressed 50.0 cm by a 2.00 kg block. When released the block travels over the frictionless track until it is launched into the air at point B. The inclined part of the track makes an angle of 8= 55.0" with the horizontal and point B is a height h= 4.50 m above the ground. What is the speed of the block at point B? equilibrium Option1 Option2 Option3 Option4 Option5 0.56 m/s 1.06 m/s 2.06 m/s 4.06 m/s 6.06 m/s

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.