| The trajectory of a projectile with an initial velocity at an angle above the horizontal. Vr represents the resultant |
| velocity, Vv represents the vertical velocity, and Vh the horizontal velocity. |
| 1) Use the following two kinematics equations to show that the above projectile follows a parabolic path. |
Δy = vi Δt + 1/2gΔt2 |
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| 2) A space-flight projectile is launched in a parabolic trajectory. An astronaut in this practice capsule feels |
| weightless. |
| (a) Why? |
| (b) In what sense is he weightless? |