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A: Mass of block m= 220g = 0.22kg Length of string R = 60cm = 0.60m R. P. M = 65 = w
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A ball is dropped from rest from a height of 20.0 m above the ground:
i) How long will it take the ball to hit the ground?
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- A man is standing on the edge of a 20.0 m high cliff. He throws a rock vertically with an initial velocity of 10.0 m/s. a) 5. How high does the rock go? (Remember that at its max height v = 0 m/s) How long does it take to reach its max height | b)4) A car drives horizontally off a 56 m tall cliff with an initial speed of 26 m/s. How far from the base of the cliff does it land?A baseball is hit at the ground level. the ball reaches its maximum height above the ground level 3.0 s after being hit. Then 2.5 s after reaching its maximum height, the ball barely clears a fence that is 97.5 m from where it was hit. Assume the ground is level. a) What maximum height above ground level is reached by the ball? b) How high is the fence? c) How far beyond the fence does the ball strike the ground?
- : a) As soon as a ball is released from rest from height h, another ball is moving upwards. It was laid vertically. The second ball's initial velocity so that the two balls meet at height h / 2 what should beAn attacker at the base of a castle wall 3.65 m high throws a rock straight up with speed 7.4m/s from a height of 1.55m above the ground. a) will the rock reach the top? b) if so what is its speed at the top? if not, what initial speed must it have to reach the top? c) find the change in speed of a rock thrown straight down from the top of the wall at an initial speed of 7.4 m/s and moving between the same two points. d) does the change in speed of the downward moving rock agree with the magnitude of the speed change of the rock moving upward between the same elevations? e) why does this agree or not agree.69) A rescue helicopter is hovering over a person whose boat has sunk. One of the rescuers throws a life preserver straight down to the victim with an initial velocity of 1.40 m/s and observes that it takes 1.8 s to reach the water. (a) List the knowns in this problem. (b) How high above the water was the preserver released? Note that the downdraft of the helicopter reduces the effects of air resistance on the falling life preserver, so that an acceleration equal to that of gravity is reasonable.
- A ball is launched from a 10.0 m building with an initial speed of 15.0 ?/?. If the ball’s speed when it reaches its maximum height is 1/3 its speed when it is at half its maximum height, determine ball’s launch angle and the ball’s angle at impact. This is all the information i was given!A projectile is fired from point A at the edge of a cliff, whose initial velocity components are v0x = 60.0m / s and v0y = 175m / s. The projectile rises and then falls into the sea at point P. The projectile flight time is 40.0s and it does not experience appreciable air resistance in flight. a) Make a diagram of the problem, b) Determine how far it falls, c) what is the height of the cliff? and d) at what angle was it shot?A rock is thrown from a cliff and lands 20.2 m from the base of the cliff, and it was thrown horizontally with a speed of 12.7 m/s. a.) How tall is the cliff?
- 9) A ball is thrown straight up from the edge of the roof of a building. A second ball is dropped from the roof one second later. a) If the height of the building is 20m, what must the initial speed of the first ball be if both are to hit the ground at the same time? b) What must the height of the building be for both balls to reach the ground at the same time if |v] = 6™ ?7) A ball is to be shot from level ground with a certain speed. The graph below shows the range R it will have versus the launch angle 0o. The value of 0, determines the flight time; let max represent the maximum flight time. What is the least speed the ball will have during its flight if 0o is chosen such that the flight time is 0.500A projectile launcher is clamped to a bench with the muzzle 0.85 m from the floor. It launches a small ball at an angle of 35° with a velocity of 15.5 m/s. The ball travels freely until it eventually hits the floor, assuming no air resistance or draughts calculate the following: a) The time it takes to reach its maximum height. b) The maximum height of the ball above the floor. c) The total time the ball spent in the air d) The total distance travelled horizontally by the ball from the end of the muzzle to its first impact with the floor.