A 0.35 kg ball is dropped to the floor, and is in contact with the floor for 0.60 seconds. a.) If the ball is dropped from a height of 1.2 m, what is the velocity of the ball right before it hits the ground?

b.) What is the force of the ball on the ground?

c.) What is the force of the ground on the ball?

d.) What is the change in momentum from the point when the ball is dropped until it hits the floor?

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Aballet student who learns with the of his instructor is demonstrating learning.

What is the scientific definition of energy that relates to work