When an object is released from rest and falls in the absence of friction, which of the following is true concerning its motion? A. Both its acceleration and its velocity are constant B. Neither its acceleration nor its velocity is constant C. Its acceleration is constant D. Its velocity is constant

1. A ball is thrown vertically upward from the ground with a speed of 36.0 m/s. Suppose the acceleration of gravity were only 2.00 m/s² instead of 9.80 m/s² a) At what time after being thrown does the ball have a velocity of 12.0 m/s upward? b) At what time does it have a velocity of 12.0 m/s downward? c) When is the velocity of the ball zero? d) When is the displacement of the ball zero? e) What are the magnitude and direction of the acceleration while the ball is moving upward? f) What are the magnitude and direction of the acceleration while the ball is moving downward? g) What are the magnitude and direction of the acceleration when it is at the highest point?

Use the position function ?(?) = −4.9t2 + v0 + s0 for free-falling objects.  A rock is dropped from the edge of a cliff that is 176.4 meters above the water A. Determine the position function for the rock B. Find the velocity function for the rock. C. Find the velocity when t = 2 seconds. D. Find the time required for the rock to reach the surface of the water E. Find the velocity of the rock at impact with the water.

What are 3 ways an object can have acceleration? Choose the best 3 answer please. 1. Have a high speed  2. Decrease speed  3. Change direction  4. increase speed  5. Remain at rest 6. Have constant velocity

10 The engines of a rocket sitting on the ground fire to accelerate the rocket at 3.5 m/s² until it reaches an altitude of 1.2 km. At that point the engines fail and the rocket is in free fall. What height does the rocket reach in m? Assume a constant acceleration of gravity of 9.8 m/s² even at these high altitudes. Enter answer here

A rock is falling from the top of a cliff. Which of the following statements is true? a. Speed of the rock decreases and its acceleration remains constant O b. Speed of the rock increases and its acceleration remains constant Oc. Speed of the rock remains constant and its acceleration increases O d. Speed and acceleration of the rock remains constant

The leaning tower of Pisa is 56 m tall. Supposedly Galileo investigated the behavior of falling objects by dropping them from the top of this tower and timing their descent. How long would it take an object to fall 56 m if air effects are negligible?   a. 3.33 s b. 3.38 s c. 3.83 s d. 3.88 s

A rocket is launched at an angle of 60.0° above the horizontal with an initial speed of 95 m/s. It moves for 3.00 s along its initial line of motion with an acceleration of 32.0 m/s2. At this time its engines fail and the rocket proceeds to move as a free body. a. Find the maximum altitude reached by the rocket. _______m b. Find its total time of flight. _______ s c. Find its horizontal range _______ m

Assume that an MX missile goes from rest to a suborbital velocity of 8.50 km/s in 70.0 s (the actual speed and time are classified). What is its average acceleration in m/s2?  m/s2 What is its average acceleration in multiples of g?  g