A block with a mass of 4kg is pushed across a frictionless surface with a force of 8N for a time of 3s. What is the velocity of the block after the push?

The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?