The height of a helicopter above the ground is given by h = 2.90t3, where h is in meters and t is in seconds. At t = 2.30 s, the helicopter releases a small mailbag. How long after its release does the mailbag reach the ground?

I need part d and e

A rocket, initially at rest on the ground, accelerates upward with a constant acceleration of 94.0 m/s2 until it reaches a speed of 1.50E2 m/s when the engines are cut off. After that, the rocket is in free-fall. What is the maximum height reached by the rocket?

A hot-air balloon is rising upward with a constant speed of 2.39 m/s. When the balloon is 6.74 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground? Number i ! Units S

An object is thrown straight up in the air with initial speed 20. 0 m/s.What are the velocity and acceleration of the object at its maximum height? Positive y points upward. Ov = 0 m/s, a = 9.81 m/s? Ov%3D -20.0 т/s, a — — 9.81 m/s* v = 20. 0 m/s, a = - 9. 81 m/s? Ov = 0 m/s, a = -9. 81 m/s² Ov= Оv%3D 20.0 m/s, a — 9. 81 m/s? Ov = -20.0 m/s, a = 9. 81 m/s²

At time t=0 a stone is dropped from a bridge.  Δt=1.1 s later a second stone is thrown down.  Both stones hit the ground 40 meters below the bridge at the same time.  What was the initial velocity of the second stone? Use g = 10m/s/s and answer to the 0.1 m/s.

A hot air balloon is moving vertically upwards at a constant rate of 9.0 m/s. As the balloon rises, a package is dropped from the balloon and it takes 5 s to hit the ground. How far did the package fall? Make sure to include a diagram of the physical situation, label known and unknown quantities with units, and coordinate system. Thanks!

A rock is tossed from the top of a building at an angle of 20° above the horizontal with an initial speed of 15 m/s. The rock lands on the ground 3.0 s after it is tossed. What is the height of the building (in m)? m

2a. A worker on a rooftop is startled by a snake, scoops it with a shovel and throws it down the building at 16 m/s. What maximum height does the snake attain? Answer: 13.06m Need Help With B &C Plz. b. How much time does the snake take to reach maximum height if initial velocity is 16m/s? c. From the fall of the snake, calculate the height of the building, if the velocity of the snake is 40m/s

If a stone is dropped from the top of a tower with initial release velocity equal to zero, it falls a distance d in time t given by d = ½ gt2 where g is acceleration due to gravity (g = 9.8 m/s2). Its speed v at time t is given by v = gt. Suppose you go to the top of a tower and drop a stone. It hits the ground after 4.5 seconds. By how much does it drop in 1 second? How much is its displacement between 1 s and 2 s? What is the height of the tower? Drop = 14.7 m, Displacement = 4.9 m, Height = 19.6 m Drop = 4.9 m, Displacement = 14.7 m, Height = 99 m Drop = 4.9 m, Displacement = 14.7 m, Height = 19.6 m