Physics

1An object is thrown upward at an initial velocity and caught at the same level as it was thrown. What should the maximum height be if the hang time is 6.4?

(please report numerical value to 2 decimal places- unit will not be necessary to report)
2An object is thrown upward at an initial velocity and caught at the same level as it was thrown. What should this velocity be if the hang time is 5.1?

(please report numerical value to 2 decimal places- unit will not be necessary to report)
3A skydiver is initially freefalling but as she approaches the surface of the Earth, she releases her parachute. Which of the following statements will be true about her motion?


Choose one answer.





a. The skydiver's velocity will slow to a stop when the chute opens
b. The skydiver will begin moving in the upwards direction (away from the Earth)
c. The skydiver will reach terminal velocity when the chute opens
d. The skydiver will continue to freefall until she reaches the Earths surface

  1. 0
  2. 2
asked by Kirk
  1. at maximum, vertical velocity is zero
    time up is half the time in the air
    v = Vi - g t
    0 = Vi - 9.81 t
    Vi = 9.81 t = 9.81(3.2)
    Vi = 31.4 m/s
    h = 31.4 (3.2) - (1/2)(9.81)(3.2)^2
    h = 100.5 - 50.2
    h = 50.3

    do the second one the same way

    I refuse to reply to the third one because I think you can figure it out.

    posted by Damon

Respond to this Question

First Name

Your Response

Similar Questions

  1. Maths

    object thrown upward from an initial height of h0 feet with an initial velocity of v0 (in feet per second) is given by the formula h(t)=−16t^2+v0t+h0 feet where t is the amount of time in seconds after the ball was thrown. Also,
  2. Math

    In physics, one learns that the height of an object thrown upward from an initial height of h0 feet with an initial velocity of v0 (in feet per second) is given by the formula h(t)=−16t^2+v0t+h0 feet where t is the amount of
  3. physics

    A student throws a set of keys vertically upward to her sorority sister, who is in a window 4.30 m above. The keys are caught 1.30 s later by the sister's outstretched hand. (a) With what initial velocity were the keys thrown?
  4. Physics

    I don't understand this at all! use the position equation s=-16t^2 +v0t+s0 to write a function that represents the situation. Find the average rate of change from t1 to t2. a) An object is thrown upward from a height of 6 feet at
  5. physics and math

    hi guys, i had the following question but i keep on getting it wrong, should i use -9.8 or 9.8 m/s2 for the acceleration? im confused and would really appreciate some help. A student throws a set of keys vertically upward to her
  6. Algebra 2

    if an object is thrown vertically upward with an initial velocity of v from an original position of s, the height h at any time t is given by: h=-16t^2+vt+s (where h and s are in ft t is in seconds and v is in ft/sec) If a rock is
  7. Physics

    An object is thrown vetically upward with an initial velocity of 14.7 m/s.How long does it take for the object to be 9.8 m from its initial position?What is the instantaneous velocity at 9.8 m from its initial position. Explain
  8. Algebra

    If an object is thrown vertically upward with an initial velocity of v, from an original position of s, the height h at any time t is given by: h=-16t^2+vt+s(where h and s are in ft, t is in seconds and v is in ft/sec) a ball is
  9. Algebra 2

    If an object is thrown vertically upward with an initial velocity of v, from an original position of s, the height h at any time t is given by: h=-16t^2+vt+s(where h and s are in ft, t is in seconds and v is in ft/sec) a ball is
  10. math

    An object of mass 100g is thrown vertically upward from a point 60cm above the earths surface with an initial velocity of 150cm/sec. It rises briefly and then falls vertically to the earth, all of which time it is acted on by air

More Similar Questions