For an object in free fall a) the distance increases uniformly with time b) the acceleration increases uniformly with time c) the velocity increases uniformly with time d) none of the above is true

Which of the following describes an object which is NOT speeding up? a)  v = -1 m/s, a = -8 m/s^2 b) v = 3 m/s, a = 4 m/s^2 c) v = 7 m/s, a = -2 m/s^2 d) v = 0 m/s, a = -6 m/s^2

A toy rocket is launched from the top of a building 127 feet tall at an initial velocity of 178 feet per second a) Give the function that describes the height of the rocket in terms of time t b) Determine the time at which the rocket reaches its maximum height, and the maximum height in feet c) For what time interval will the rocket be more than 217 feet above ground level? d) After how many seconds will it hit the ground? a) The function that describes the height of the rocket in terms of t is s(t)=

- 5) Ajet plane is flying at constant altitude At time t,=0, it has components of velocity Vx=90 m/s and vy=110 m/s. At time t2=30 s, the components are v,=-170 m/s and Vy=40 m/s. For this time interval, a) find the components of the average acceleration. b) find the magnitude and direction of the average acceleration.