Recent content by DatAshe

wouldn't the before and after be the same do to conservation of momentum and energy? so mivi^2=mfvf^2 and mivi=mfvm?

Homework Statement A ball of mass 0.206 kg with a velocity of 1.54 m/s meets a ball of mass 0.291 kg with a velocity of -0.396 m/s in a head-on, elastic collision. (a) Find their velocities after the collision. 1f = m/s 2f = m/s (b) Find the velocity of their center of mass before and...

I've drawn the picture and solved it 4 or 5 times, but I keep getting the wrong answer.

Homework Statement A playground is on the flat roof of a city school, 4.9 m above the street below (see figure). The vertical wall of the building is h = 6.00 m high, forming a 1.1-m-high railing around the playground. A ball has fallen to the street below, and a passerby returns it by...

This question has me puzzled, I only have a little bit of a clue of how to do this. Any and all help is greatly appreciated:) Homework Statement Chinook salmon are able to move through water especially fast by jumping out of the water periodically. This behavior is called porpoising. Suppose...

What would an example of a distance vs time equation be? Like, speed=d/deltat or acceleration=deltax/deltat or something else?

Homework Statement A car traveling at a constant speed of 51.5 m/s passes a trooper on a motorcycle hidden behind a billboard. One second after the speeding car passes the billboard, the trooper sets out from the billboard to catch the car, accelerating at a constant rate of 2.00 m/s2. How...

Thank you so much! I didn't know that you could do that! You, PeterO, are the bomb!:D

Homework Statement A car travels along a straight line at a constant speed of 48.5 mi/h for a distance d and then another distance d in the same direction at another constant speed. The average velocity for the entire trip is 32.0 mi/h. (a) What is the constant speed with which the car...