Question
Problem 5. - Projectile Motion. An airplane is moving at a velocity v 360 km/h while descending at angle = 200 airplane when it was 600 m above the ground a) For how many seconds is the box in the air? (10 points) b) What is the horizontal distance between the point in which the (5 points) Problem 6- Newton's Laws. A block shown in Fig. 1 has mass m 5.0 kg and lies on a fixed smooth et is da the point in wich the abjetr tund? frictionless plane titled at an angle =30° to the horizontal. ind the normal force on the block and its acceleration (5 points) u lo un the 300 plane
Explanation / Answer
u = 360 km/hr = 100 m/s
angle = -20
sy = 600 m
ux = 100*cos(20)
uy = - 100*sin(20)
A)
sy = ut + 1/2at^2
-600 = - 100*sin(20)*t +(1/2)*(-9.8)*t^2
t = 8.113 sec
B)
sx = ux*t
sx = 100*cos(20)*8.113
sx = 762.37 sec
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