Physics

posted by .

A projectile is launched at an angle of 34.0o above the horizontal. The projectile has a mass of 1.50 kg and is given an initial speed of 20.0 m/s. a) What is the initial kinetic energy of the projectile? b) By how much does the gravitational potential energy of the projectile change as the projectile moves from its initial position to the highest vertical point in its motion? c) What is the maximum height reached by the projectile?

  • Physics -

    (a)
    KE=(1/2)mv²

    (b)
    At maximum height,
    KE in y-direction = 0, i.e.
    loss in KE
    =(1/2)m(v sin(θ))²

    (c)
    Maximum height, h
    equate mgh to loss in KE, or
    mgh = (1/2)m(v sin(θ))²

    Solve for h.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics- i need to know how to do these problems

    Two projectiles are launched from the ground, and both reach the same vertical height. However, projectile B travels twice the horizontal distance as projectile A before hitting the ground. a. How large is the vertical component of …
  2. Physics

    A projectile is launched with an initial speed of 40m/s at an angle of 25 degrees above the horizontal. The projectile lands 3 sec. later. Neglect air friction. What is the projectile's velocity at the highest point of it's trajectory?
  3. physics

    A projectile is launched with an initial speed of 70 m/s at an angle of 35° above the horizontal on flat ground. Neglect air friction. A)What is the projectile's velocity at the highest point of its trajectory?
  4. Physics

    A projectile is launched with an initial speed of 80.0m/s at an angle of 40 degrees above the horizontal. The projectile lands on a hillside 3.80s later. Neglect air friction. What is the projectile's velocity at the highest point …
  5. Physics

    What is the kinetic energy of an ideal projectile of mass 19.4 kg at the apex (highest point) of its trajectory, if it was launched with an initial speed of 29.2 m/s and at an initial angle of 46.9° with respect to the horizontal?
  6. Physics

    A projectile is launched with an initial speed . At its highest point, the projectile's speed is . What was the launch angle above the horizontal?
  7. Physics

    A projectile is launched with an initial speed V0. At its highest point, the projectile's speed is V0/2 . What was the launch angle above the horizontal?
  8. Physics Projectile Motion

    A projectile is launched at ground level with an initial speed of 51.5 m/s at an angle of 35.0° above the horizontal. It strikes a target above the ground 2.50 seconds later. What are the x and y distances from where the projectile …
  9. Physics

    A projectile is launched at an angle of 20.0 degrees above the horizontal with an initial speed of 88.1 m/s. The maximum height reached by the projectile will be ____ m.
  10. Physics

    A projectile is launched with an initial speed of 59.0 m/s at an angle of 32.0° above the horizontal. The projectile lands on a hillside 3.80 s later. Neglect air friction. (Assume that the +x-axis is to the right and the +y-axis …

More Similar Questions