During a collision that last 3 seconds, an object has its momentum changed by 3 kgm/s. What was the average Force acting on the object (in Newtons) during this collision

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

An open cart is moving along a straight frictionless horizontal track. when rain starts falling vertically into the cart, what happens to the speed of the cart?

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.