Question

A projectile has a range R when it is launched with an initial velocity v at an initial angle of θ to the horizontal.

If the initial angle was changed to θ/2, the new range would be ____________

		more than R
		we need to know the value of θ to answer the question.
		R
		less than R

Answer 1

Answer:

We need to know the value of to answer this question.

Reason: The relation for the range is

Now the range is maximum when

.... ()

Thus range is maximum only if = 45° and the range will go on decreasing as we go away from 45° no matter whether we increase it above 45° or decrease it below 45°.