Which statement describes the motion of a ball as it drops onto a vertical spring? a. The acceleration of the ball decreases as the spring shrinks.
b. The accIleration of the ball decreases as the spring extends.
c. The velocity of the ball changes from positive to negative as the spring shrinks.
d. The velocity of the ball changes from negative to positive as the spring extends.

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.

it is called kinetic energy

the assestment will probley apele with cause and effect

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s