A rock is thrown straight downward from a tree limb with an initial velocity v_0. The...
A rock is thrown straight downward from a tree limb with an initial velocity v0. The rock has constant downward acceleration of 10 m/s2 during its fall. The rock moves 9 times as far during the first 3 seconds as during the first 1 second of fall. What is the value (magnitude only) of v0?
A rock is thrown straight up with an initial velocity of 25 m/s. What maximum height will the rock reach before starting to fall downward?
A rock is thrown straight up with an initial velocity of 29.4 m/s. What time interval elapses between the rock's being thrown and its return to the original launch point? (Acceleration due to gravity is 9.80 m/s2.)
A ball is thrown straight downward from the top of a building. Its initial velocity is 12 m/s downward. It hits the ground 1.2s after release. How tall is the building? *ignoring any air resistance* Please explain in detail why you need to solve for vf first using Vf=Vo+at and then plug Vf into Vf^2=Vo^2+2a(x2-x1) I assumed that since the ball hits the ground that vf=0m/s but using that I am getting the incorrect answer of 7.3m instead of the correct...
A rock is thrown straight upwards from 1 m off the ground with an initial velocity of 5 m/s. How long would it take to return to the point it was thrown?
16) A ball is thrown straight up in the air with an initial velocity of 40 m/s, assume the ball is in free fall and is accelerating at a rate of approximately ay = - 10 m/s", what is the approximate velocity of the ball after 3 seconds? 17) A jet airplane (mjet = 4,000 kg) speeds up in three-dimensional space for 5 seconds, the jets initial and final velocities are given below, what is the magnitude of the jets...
A rock is thrown vertically upward with (initial) velocity of 30 m/s. Hint: Use acceleration constant g = 9.8 m/s2. a) Find the velocity of the rock for all relevant times. b) Find the position of the rock for all relevant times. c) Find the time when the rock reaches its highest point. What is its height? d) Find the time when the rock hits the ground.
An object is thrown downward with an initial velocity of 3.00 m / s from a height of 45.0 m. Determine the time in seconds it takes to reach the ground.
A ball is thrown straight up with an initial velocity of 19.6 m/s. Assume it experiences a constant acceleration of 9.8 m/s^2 down (due to gravity) throughout the entire motion. The motion we will consider is the one from the time it was thrown upward to the time it returns to its initial height, which will take a total of 4 seconds. (a) find an expression for the ball's acceleration as a function of time (b) sketch the acceleration as...
A rock is thrown straight vertically upward with an initial velocity of 15 m/s. Ignore energy lost to air friction. The rock will rise to a maximum height of The velocity of the rock at half that maximum height is A Hooke's law spring is compressed 12 cm from equilibrium and the potential energy stored is 3.6 J. The spring constant in this case is The spring is then used to launch a mass of 50 gram along a frictionless...