A stone is thrown vertically upward. On its way up it passes point A with a speed v, and point B, 4.00 m higher than A, with a speed of 1/3 v. The speed v is:
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- A student standing on a cliff throws a stone from a vertical height of d=8.0m above the level ground with velocity v0=24m/s at an angle θ=15∘�=15∘ below the horizontal, as shown. It moves without air resistance. With what speed in m/s does the stone hit the ground?If an object were to freely, from what height would it need to drop to reach a speed of 70.0m / s before reaching the ground?A sky diver drops his smuggled 1kg weight from physics lab out of the air plane before he jumps, which is flying horizontally going 175 m/s at a height of 2 km. IF WE ASSUME NO AIR RESISTANCE, what is the Velocity (magnitude and direction) when it hits the ground?
- A spherical ball is thrown vertically downward With an initial the speed of 11.35 m/s from the top of a building 30 m high. a.An electron is moving with an initial speed of 3.2 x 105 m/s toward a proton that is stationary. If the electron is very very far away from the proton initially, what distance from the proton does the electron have twice the speed it did originally?A boat takes 3.0 h to travel 30 km down a river, then 5.0 h to return. How fast is the river flowing?
- A skier starts from rest from a height of 20 m and skis down the slope into a valley and back up a slope of 12 m high with respect to the valley. What speed does the skier have the moment he reaches the height of 12 m?A juggler throws a bowling pin straight up with an initial speed of 6.1 m/s from an initial height of 2.8 m. How much time elapses until the bowling pin returns to the same initial height? Answer without rounding offan object is thrown downward with an initial (t=0) speed of 10m/s from a height of 60m above the ground. at the same instant a second object is thrown verically from ground level at a speed of 40m/s. What height will they pass?
- An airplane flies from San Francisco to New York (about 4800 km, or 4.80 * 10^6 m) at a steady speed of 300 m/s (about 670 mi/h). How much time does the trip take, as measured by an observer on the ground? By an observer in the plane?A stone is thrown vertically upward with a speed of 12.0 m/s from the edge of a cliff 70.0 m high. What is the magnitude of its speed just before hitting the ground at the base of the cliff? (answer should look like '18.9 m/s')A student standing on a cliff throws a stone from a vertical height of d=8.0mabove the level ground with velocity v0=15m/s at an angle θ=18∘ below the horizontal.It moves without air resistance. Use a Cartesian coordinate system with the origin at the initial position of the stone. With what speed, in meters per second, does the stone strike the ground?