The bullet in the previous problem strikes a 2.5-kg steel ball that is at rest. After the collision, the bullet bounces
backward at 5.0 m/s. How fast is the ball moving when the
bullet bounces backward?

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

Abucket full of water weights 4 kg and water well is 10m deep. a girl draws water from the well. it takes the girl 3 minutes to draw a bucket full of water from the well. what is the power of the girl?

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?