25. a river flows toward the east. because of your
knowledge of physics, you head your boat
53° west of north and have a velocity of
6.0 m/s due north relative to the shore.
a. what is the velocity of the current?
b. what is your speed relative to the water?

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?

How to calculate voltage drop in a series circuit

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?