Question
Asked Sep 10, 2019
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A projectile is fired from the ground at 37 degrees above the horizon at a speed of 50 m/s. 

a) Determine the position of the highest point and the time it takes to reach it. 

b) Determine the position and time at which it strikes a wall 200m away. 

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Expert Answer

Step 1

a) Position of highest point is,

3 sin° e
h=
2g
_(50m/s) sin 37°)
2(9.8 m/s2
= 46.20m
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3 sin° e h= 2g _(50m/s) sin 37°) 2(9.8 m/s2 = 46.20m

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Step 2

Time taken to reach the highest point is,

sine
(50m/s)(sin 37°)
(9.8m/s?
=3.07s
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sine (50m/s)(sin 37°) (9.8m/s? =3.07s

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Step 3

b) Position at which the project...

yxtan
215 cos
(98m/s(200m)
= (200m)(tan 37")2(50m/s) (cos 37°)
27.79m
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yxtan 215 cos (98m/s(200m) = (200m)(tan 37")2(50m/s) (cos 37°) 27.79m

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Kinematics

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