. Mwtilplechodce 50 pts sotal os a clier Isuasches a large round rock towards pr

Question

. Mwtilplechodce 50 pts sotal os a clier Isuasches a large round rock towards problems (5 pts each question a ship on A catapah on syesel iliectod at an angle O ahove the hortaontal with a oa die gemains to flight for 10 seconds and travels two questions you are asked to think about veloety the rock is launch (the rock's initial velocity Vo) vertical component of the initial velocity of the ruck, oy A. 57 m/s C. 21.5 m/s D. 12.9 m/s E. Not enough information to determine. 2. Which one of the following choices best represents the velocity and acceleration of the rock at the top of its the velocity A. Both velocity and acceleration are zero B. Vertical component of velocity is zero and acceleration is zero. C. Horizontal component of velocity is zero and acceleration is zero. D. Velocity is zero, but acceleration is not zero. E. Other Question 3 A 2 kg particle is moving at the constant velocity of the forces is F 9 Ni H6 N)j. Determine the i-component of the other force. act on A. 3 N E. Other

Explanation / Answer

1)

along vertical

initial velocity = voy

acceleration ax = -9.8 m/s^2

displacement x = 80 m

time t = 10 s

y = voy*t + (1/2)*ay*t^2

-80 = v0y10 - (1/2)*9.8*10^2

v0*sintheta = 41 m/s

OPTION ( B ) <<<-------ANSWER

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2)

at the top ertical component of velocity vy = 0

acceleration ay = -g = -9.8 m/s^2

OPTION ( E)

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Q3)

for a particel moving at constant velocity

acceleration a = dv/dt = 0

from newtons second law Fnet = m*a = 0

Fnet = F1 + F2

F1 + F2 = 0

F2 = -F1

F2 = -9i - 6j

i - component of the other force = -9 N

OPTION ( C )

DONE please check the answer. any doubts post in comment box

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