Calculate the speed, vf, of a rock, right before hitting the ground, if dropped from 11m. Ignore frictional forces.
A) 5.351ms;
B) 14.683ms;
C) 1.336ms;
D) 215.82ms;
Calculate the speed, vf, of a rock, right before hitting the ground, if dropped from 11m....
25. An iron ball is dropped from rest, it falls 250.9 m before hitting the ground. What is the velocity just before it hits the ground ?
A rock is dropped from a height of 110 meters above the ground. One second later, a ball is thrown vertically downward from the same height with an initial speed of 14 m/s. A. At what time after the ball if thrown are the two objects at the same height above the ground? B. What is the speed of the rock when the ball hits the ground?
A rock is dropped from 20 m above the ground. At the same time, another rock is thrown up with an initial speed of 10 m/s. At what time and height will they meet in the air? When they meet, what are the velocities of the two rocks?
A 2.45 kg rock is dropped from the top of a 15.5m vertical cliff a)What is the potential energy of the rock relative to the base of the cliff before it is dropped b) What is the kinetic energy of the rock just before it hits the ground below? c) What is the velocity of the rock at a point 5.00 m above the base of the cliff? d) How much total energy does the rock have half way down?
An object is dropped from a height of 55 m above ground level. a) Determine the distance traveled, in meters, during the first second. b) Determine the final speed, in meters per second, at which the object hits the ground. c) Determine the distance, in meters, traveled during the last second of motion before hitting the ground.
A spring-gun projects a small rock from the ground with speed
v0 at an angle ?0 above the ground. You have been
asked to determine v0. From the way the spring-gun is
constructed, you know that to a good approximation v0 is
independent of the launch angle. You go to a level, open field,
select a launch angle, and measure the horizontal distance the rock
travels. You use g = 9.80 m/s2 and ignore the small height
of the end...
A rock is dropped from rest. It hits the ground after 16.4 seconds. What was the initial height of the rock, in km?
A rocket is fired at an initial speed v0 = 141.0 m/s from ground level, at an angle θ = 33 degrees above the horizontal. Ignore air resistance. The magnitude of the gravitational acceleration is 9.8 m/s2. Choose the RIGHT as positive x-direction. Choose UPWARD as psotitive y-direction. Keep 2 decimal places in all answers (a) Find v0x, the x component of the initial velocity (in m/s) (b) Find v0y, the y component of the initial velocity (in m/s) (c)...
9, Galileo throws a rock from the top of the Leaning Tower of Pisa at an upward angle of 69.00 with speed vo. The rock is in flight for 5.2 s and hits the ground 15 m from the base of the building. Ignore air resistance and ignore the fact that the two tilts a bit. a) What is the speed vo? Vo b) How high off the ground is the top of the tower? Height of tower c) What...
A rock is thrown (not dropped) straight down from a bridge into the river below. At each of the following instants, is the magnitude of the rock's acceleration greater than g, equal to g, less than g, or 0? Explain? a. immediately after being released. b. just before hitting the water.