Asquirrel drops an acorn onto the head of an unsuspecting dog. the acorn falls 4.0 m before it lands onthe dog. we can ignore air resistance.

well please specify if we can ignore air resistance, first we need to find out the wind speed, the mass of the acorn, and the volume.

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.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.