At a construction site, a pipe wrench strikes the ground with a speed of 29.6 m/s .
Part A From what height was the wrench dropped?
Part B For how long was it falling?
At a construction site, a pipe wrench strikes the ground with a speed of 29.6 m/s...
A ball is thrown upward from the ground with an initial speed of 16.6 m/s; at the same instant, another ball is dropped from a building 20 m high. After how long will the balls be at the same height above the ground?
A ball is thrown upward from the ground with an initial speed of 20.0 m/s; at the same instant, another ball is dropped from a building 12 m high. After how long will the balls be at the same height?
A ball is thrown upward from the ground with an initial speed of 20.2 m/s; at the same instant, another ball is dropped from a building 20 m high. After how long will the balls be at the same height?
A cannonball is fired from 15 m above the ground, with a speed of 40. m/s at an angle of 35.0◦ . (a) How long is the person in the air before hitting the ground? (b) What is their maxiumum height? (c) What was their total range? (Range refers to their final horizontal displacement)
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 helicopter is ascending vertically with a speed of 5.51 m/s . At a height of 126 m above the Earth, a package is dropped from the helicopter. Part A How much time does it take for the package to reach the ground? [Hint: What is v0 for the package?
A 114 gram tennis ball strikes the court ground vertically with a speed of 3 m/s. If the ball bounces back with a speed of 2.8 m/s vertically upward, find the magnitude of the change in the tennis ball’s momentum, in kg m/s.
A catapult launches a large stone from ground level at a speed of 43.4 m/s at an angle of 54.0° with the horizontal. The stone returns to ground level shortly thereafter. (a) How long is it in the air? _____ s (b) What maximum height does the stone reach? (Neglect air friction.) _____m
You throw a ball straight up from the ground (? = 0) with an initial speed of 20 m/s. At the same time (? = 0), another ball is dropped from a building that is 15 m high. How long will it take for the two balls to be exactly the same height off the ground?
A bolt is dropped from a bridge under construction, falling 81 m to the valley below the bridge. (a) How much time does it take to pass through the last 30 % of its fall? What is its speed (b) when it begins that last 30 % of its fall and (c) just before it reaches the ground?