Assume that the elastic bands on a slingshot work like a spring with a spring constant of 250 n/m (they actually follow a slightly different, though similar, law than springs). if you have to pull back with 100 n of force to hold the pouch against bands that start out 20 cm long, how long (meters) are the bands when stretched?

What properties of a moving object are used in determining the object's energy of motion

Place me with this question is my last question

On a horizontal frictionless surface, a small block with mass 0.200 kg has a collision with a block of mass 0.400 kg. immediately after the collision, the 0.200 kg block is moving at 12.0 m/s in the direction 30° north of east and the 0.400 kg block is moving at 11.2 m/s in the direction 53.1° south of east. use coordinates where the +x-axis is east and the +y-axis is north.(a) what is the total kinetic energy of the two blocks after the collision (in ) what is the x-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your ) what is the y-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your answer.)