(a) A rock is dropped from a cliff 45.0 m high. After what time interval does...
A ball is thrown directly downwards with a an initial speed of 8 m/s from a height of 84 m. After what time interval does it strike the ground?
A ball is thrown directly downwards with a an initial speed of 8 m/s from a height of 84 m. After what time interval does it strike the ground?
A rock is dropped from the top of a vertical cliff and takes 3.00 s to reach the ground below the cliff. A secon rock is thrown vertically from the cliff, and it takes this rock 2.00 s to reach the ground below the cliff from the time it is released. With what velocity was the second rock thrown, assuming no air resistance? Select one: a. 5.51 m/s downward , b. 4.76 m/s downward X O c. 12.3 m/s downward...
will it go? * 31 A rock is dropped from a treetop 19.6 m high, and then, 1.00 s later, a second rock is thrown down. With what initial velocity must the second rock be thrown if it is to reach the ground at the same time as the first?
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 stone is thrown directly upward with an initial speed of 5.7 m/s from a height of 13.6 m. After what time interval (in s) does the stone strike the ground? Use g = 9.8 m/s2. Enter a number with 2 digits behind the decimal point.
A man stands at the edge of a cliff and throws a rock
horizontally over the edge with a speed of
v0 = 15.5 m/s.
The rock leaves his hand at a height of
h = 46.0 m
above level ground at the bottom of the cliff, as shown in the
figure. Note the coordinate system in the figure, where the origin
is at the bottom of the cliff, directly below where the rock leaves
the hand
m
How long...
A rock is thrown off a cliff at an angle of 51° above the horizontal. The cliff is 130 m high. The initial speed of the rock is 20 m/s. (Assume the height of the thrower is negligible.) (a) How high above the edge of the cliff does the rock rise (in m)? (b) How far has it moved horizontally when it is at maximum altitude (in m)? (c) How long after the release does it hit the ground (in s)? (d) What is...
a. An attacker at the base of a castle wall 3.65 m high throws a rock straight up with speed 7.40 m/s from a height of 1.55 m above the ground. Will the rock reach the top of the wall? If so, how fast is it moving when it reaches the top. If not, what initial speed must it have to reach the top? b. To defend the castle, a rock is thrown downwards from the top of the wall...
a. An attacker at the base of a castle wall 3.65 m high throws a rock straight up with speed 7.40 m/s from a height of 1.55 m above the ground. Will the rock reach the top of the wall? If so, how fast is it moving when it reaches the top. If not, what initial speed must it have to reach the top? b. To defend the castle, a rock is thrown downwards from the top of the wall with...
A 0.26-kg rock is thrown vertically upward from the top of a cliff that is 32 m high. When it hits the ground at the base of the cliff, the rock has a speed of 33 m/s . Part A Assuming that air resistance can be ignored, find the initial speed of the rock.(Express your answer using two significant figures.) Part B Find the greatest height of the rock as measured from the base of the cliff. (Express your answer...