Question

淺沫

求過程感謝😭

5. (1) A projectile lands at the level from which it was fired. (a)
For what initial angle is the horizontal range equal to the
maximum height? (b) For what initial angle is the range
equal to half the maximum height?
6. (II) A projectile is fired up an incline with an initial speed vo
at an angle o to the horizontal, as shown in Fig. 4.42. (a) If
the angle of the incline is a to the horizontal, show that the
range along the incline is
2võ sin(0 – a) cos e
0
R =
g cosa a
(b) Recast this expression for R by using a trigonometric
identity for sin A cos B. For what value of 8 is R a maxi-
mum? (c) Show that the maximum value of R is
vô
R=
g(1 + sin a)
90-0-2x
0-a
001
R