You throw a ball upward with an initial velocity of 8.2 m/s. Gravity gives the ball a downward acceleration of -9.8 m/s2. What is the velocity of the ball 1.5 s after it was thrown?

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

After a big snowfall, you take your favorite rocket-powered sled out to a wide field. the field is 195 m across, and you know that your sled accelerates at a rate of 3.65 m/s2 when the rocket is on. how much time will it take the sled to cross the field starting from rest, assuming the rocket is on the whole time?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.