A boat crosses a 200m wide river at 3m/s ,north relative to water. the river flows at 1 m/s as shown . what is the velocity of the boat as observed on the river back from the boat departed

Question part points submissions used suppose that 2 j of work is needed to stretch a spring from its natural length of 26 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 28 cm to 32 cm? (round your answer to two decimal places.)

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot

A10 kg box initially at rest is pulled 18 meters across a horizontal, frictionless surface by a 40 n force. what is the block’s final velocity over the 18 meters?