A bumper car with a mass of 150 kg is moving forward at 10 m/s. It collides with a stationary bumper car with a mass of 200 kg. After the collision, the 200 kg bumper car moves forward at 8.0 m/s. Does the 150 kg bumper car continue to move forward or start to move backward after the collision?

3. a particle with initial velocity v⃗ 0=(5.85×103m/s)j^ enters a region of uniform electric and magnetic fields. the magnetic field in the region is b⃗ =−(1.35t)k^. you can ignore the weight of the particle. a. calculate the magnitude of the electric field in the region if the particle is to pass through undeflected, for a particle of charge +0.640 nc.