7. A bullet of mass 100 g is fired into a stationary target of mass 4.o kg. The target is mounted on low-friction wheels and moves off at a velocity of 5.0 ms-1 when the bullet enters it. The bullet stays in the target. Calculate the velocity of the bullet before it strikes the target.

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

Assume this car is driven off a cliff . how many arrows of force need to be drawn in the free body diagram? assume no air resistance -five -one -three -four

Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)