A rocketis caused to ascend vertically from the ground with a constant acceleration, a. At a time, t,, after leaving the ground the rocket motor is shut off. (a) Neglecting air resistance and assuming the acceleration due to gravity, g, is constant, sketch a graph showing how the velocity of the rocket varies with time from the moment it leaves the ground to the'moment it returns to ground. In your sloetch represent the ascending velocity as positive and the descending velocity as negative. Indicate on your graph (i) (i) the time to reach maximum height, As (1i) the time of flight, to (b) Account for the form of each portion of the graph and explain the significance of the area between the graph and the time axis from zero time to (1) . (i) f (lii) te (c) Either by using the graph or otherwise, derive expressions in terms of a, g and t for (i) (ii) the maximum height reached, (ii) f.
A rocketis caused to ascend vertically from the ground with a constant acceleration, a. At a time, t,, after leaving the ground the rocket motor is shut off. (a) Neglecting air resistance and assuming the acceleration due to gravity, g, is constant, sketch a graph showing how the velocity of the rocket varies with time from the moment it leaves the ground to the'moment it returns to ground. In your sloetch represent the ascending velocity as positive and the descending velocity as negative. Indicate on your graph (i) (i) the time to reach maximum height, As (1i) the time of flight, to (b) Account for the form of each portion of the graph and explain the significance of the area between the graph and the time axis from zero time to (1) . (i) f (lii) te (c) Either by using the graph or otherwise, derive expressions in terms of a, g and t for (i) (ii) the maximum height reached, (ii) f.
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