Physics

posted by .

A person is standing on the edge of a cliff of height h= 24 m. She throws a stone of mass m=0.2 kg vertically down with speed v0= 10 m/s (stone 1) and another stone of the same mass vertically up at the same speed (stone 2). The gravitational acceleration is g=10 m/s2.

(a) What is the speed of stone 1 at the bottom of the cliff? (in m/s)

(b) What is the speed of stone 2 at the bottom of the cliff? (in m/s)

(c) What is the time of flight of stone 1 when it hits the bottom of the cliff? (in s)

(d) What is the time of flight of stone 2 when it hits the bottom of the cliff? (in s)

(e) What is the average speed of stone 1 during its flight? (in m/s)

(f) What is the average speed of stone 2 during its flight? (in m/s)

(g) What is the magnitude of the average velocity of stone 1 during its flight?
(magnitude in m/s)

(h) What is the magnitude of the average velocity of stone 2 during its flight?
(magnitude in m/s)

Please help!!How to do it??

  • Physics -

    Y=Y-0 +v-0*t-5t^2
    solve for t (you will get a quadratic equation so use alphawolfram)
    I have only solved for stone one as for stone two they havent given much detail.
    then for final velocity
    average speed and average velocity seem more or less the same since there is no 0 displacement and its linear motion.

  • Physics -

    @kunoi i didn't got f, g &h

  • Physics -

    I didn't get h but for f and g use the formula speed=distance/time and velocity=displacement/time. Time is the same as the one you got in c and d. for distance, the first stone is 24 but for the second stone, its 24+ the upward distance calculated by the formula s=ut-5t^2. Btw the velocity of both the stones at the bottom of the cliff are the same.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    Multiple part question….. A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 18.0 m/s. The cliff is 50.0m above a flat, horizontal beach. With what angle of impact does the stone …
  2. physics

    a person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of 18 m/s. the cliff is 52 m above the waters surface. how long does it take for the stone to fall to the water?
  3. Physics

    A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 21.0 m/s. The cliff is h = 60.0 m above a flat horizontal beach. A)How long after being released does the stone strike the beach …
  4. physics

    A boy drops a stone-A, down from a cliff 480 meters high, next he throws a stone-B, 1 second later - at what initial velocity was the stone-B be thrown so as to meet the stone-A on ground at the same time?
  5. physics

    A stone with mass m = 2.3 kg is thrown vertically upward into the air with an initial kinetic energy of 190 J. The drag force acting on the stone throughout its flight is constant, independent of the velocity of the stone, and has …
  6. Physics

    A person standing at the edge of a seaside cliff kicks a stone horizontally over the edge with a speed of 14.3 m/s. The cliff is 47.6 m above the water's surface. How far in meters from the base of the cliff does the stone land?
  7. Physics

    A person standing at the edge of a seaside cliff kicks a stone horizontally over the edge with a speed of 14.3 m/s. The cliff is 47.6 m above the water's surface. How far in meters from the base of the cliff does the stone land?
  8. Physics

    a person standing at the edge of a seaside cliff kicks a stone horizontally over the edge with speed of 31 m/s cliff is 51 m above water. how far from base of cliff does stone land and what is speed of stone when it hits water
  9. physics

    A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 12.6 m/s. The cliff is 49.1 m above a flat horizontal beach as shown in the figure. a.How long after being released does the stone …
  10. math

    a child standing at the edge of a cliff 100m high throws a stone vertically downwards. The stone hits the sea 4s later. Ignoring air resistance, find the initial speed with which the stone is thrown

More Similar Questions