A block of mass 2 kg is attached to one end of a massless spring whose other end is…
PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A block of mass 2 kg is attached to one end of a massless spring whose other end is fixed at a wall. The spring-mass system moves on a frictionless horizontal table. The spring's natural length is 2 m and spring constant is 200 N/m . The block is pushed such that the length of the spring becomes 1 m and then released. At distance x m ( x<2 ) from the wall. the speed of the block will be
(a) 10[1−(2−x)]3/2 m/s
(b) 10[1−(2−x)2]1/2 m/s
(c) 10[1−(2−x)2] m/s
(d) 10[1−(2−x)2]2 m/s