A 9,500-kg truck runs into the rear of a 1,000-kg car that was stationary. The truck and car are locked together after the collision and move with speed 6 m/s. Compute how much kinetic energy was "lost" in this inelastic collision.

In a 1.25-t magnetic field directed vertically upward, a particle having a charge of magnitude 8.50 mc and initially moving northward at 4.75 km> s is deflected toward the east. (a) what is the sign of the charge of this particle? make a sketch to illustrate how you found your answer. (b) find the magnetic force on the particle.