Select the letter to the left of the applet to initialize Problem J.

  1. A projectile is launched from ground level at 45°. At the same instant, the target--initially at the origin--accelerates uniformly from rest. Determine the acceleration of the target required to intercept the projectile.
  2. If the initial speed of the projectile is 30 m/s but the angle of launch remains the same, what must the acceleration of the target be?
  3. If the launch takes place on the Moon, what must the acceleration of the target be? (Select an initial projectile speed so that the intercept point is on screen.)
  4. By now, you should have seen a pattern. You should have also obtained a single formula that relates three things: a) angle of launch, b) gravitational field strength, c) acceleration of target. Using this relationship, determine the angle of launch on planet X (g=20 N/kg) for a target acceleration of 30 m/sē. Oh, by the way, select the initial projectile speed so that the range is 375 m.

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