A block of mass 0.10 kg is attached to one end of a spring with spring constant 50n*m. The other end of the spring is secured to a wall. The block is pushed against the spring, which compresses the spring to a position of x=-0.04m. When uncompressed, the end of the spring that is attached to the block is at a position of x=0.00m. The block-spring system is then released from rest, and the block travels along a horizontal, rough track. A motion sensor is placed so that it measures the velocity of the object as it slides along the track. A graph of total mechanical energy of the block-spring system as a function of position is shown. Which of the following statements about the block-spring system are true? Select two answers.

The force exerted on the block by the spring at x=−0.02 m is 1 N.

The block has maximum speed at x=0.00 m.

The block has half the initial spring potential energy at x=−0.025 m.

The work done by friction as the block travels from x=-0.04 m to x=-0.02 m is 0.01 J