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☆☆☆☆☆Cards in this guide (9)
A rock is dropped from a cliff and hits the ground 6.0 seconds later How high is the cliff
176.4 meters
A hammer is dropped off a roof of an apartment building that is 80 meters high How long will it take to hit the ground
The hammer will take square-root(2x80/9.8)= 4.04 seconds to hit the ground.
The distance is related to the time by s=v0t + 1/2 gt^2 where vo, the initial velocity is=0.
The answer is 4.04 or rounded is 4 seconds.
A plane is uniformly accelerated from 60 ms to 80 ms in 12 seconds what is the distance traveled by the plane during this period
((60m/s+80m/s)/2)x12s=840m
A plane traveling at 80 ms lands on a runway and comes to rest after 10 seconds What was the plane's deceleration
-80/10 = -8 m/s2
An arrow is shot straight up at an initial velocity of 250 ms How long will it take the arrow to hit the ground
51 seconds
A ball is thrown horizontally from a cliff at a speed of 15 ms and strikes the ground 45 meters from the base of the cliff How high was the cliff rounded to the nearest meter
Answer: 44 meters
What does a force cause a mass to do
accelerate
What force is needed to give a 2000 kg car an acceleration of 1.5 ms³
3,000
120 meters northeast vector or scalar
Vector, magnitude and direction.
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