Ajavelin thrower sends her javelin with an initial velocity of 23.5 m/sec at an angle of 25.0°. if the distance of her throw was measured to be 45.7 m, at what height did she release the javelin?

answer: point c: b. 1/2 potential, 1/2 kinetic, point a: 3/4 of its potential energy, point d or b: 3/4 potential, 1/4 kinetic

explanation: i cant explain. it's difficult to explain.

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

it is b. absorbs thermal energy