Arocket takes off vertically from the launchpad with no initial velocity but a constant upward acceleration of 2.25 m/s2. at 15.4 s after blastoff, the engines fail completely so the only force on the rocket from then on is the pull of gravity. (a) what is the maximum height the rocket will reach above the launchpad? (b) how fast is the rocket moving at the instant before it crashes onto the launchpad? (c) how long after engine failure does it take for the rocket to crash onto the launchpad?

Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?

Humidity is to blame for that muggy, steamy feeling you experience on some hot summer days. what gas in the atmosphere causes humidity? a) oxygen b) hydrogen c) nitrogen d) water vapor

A1000-kg car is moving at 30 m/s around a horizontal unbanked curve whose diameter is 0.20 km. what is the magnitude of the friction force required to keep the car from sliding?