Aball at rest starts rolling down a hill with a constant acceleration of 3.2 meters/second. what is the final velocity of the ball after 6.0 seconds?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

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?