![v_{f}^{2} = v_{0}^{2} +2*g*y\\ where\\v_{f} =final velocity [m/s]\\v_{0}= initial velocity [m/s] = 2 [m/s]\\\\g=gravity[m/s^2] = 9.81[m/s^2]\\y=distance = 60[m}\\\\replacing:\\\\v_{f}^{2} = 2^{2} +2*9.81*(60)\\\\v_{f}=\sqrt{1181.2} \\v_{f}=34.36[m/s]](/tpl/images/0437/5484/85166.png)
![v_{f}=v_{0} +g*t\\ replacing\\34.36=2+(9.81)*t\\t=\frac{34.36-2}{9.81}=3.3[s]](/tpl/images/0437/5484/5dfe2.png)
![x=x_{0}+v_{0}*t+\frac{(a*t^{2} )}{2} \\x=7+5*3+\frac{(6*3^{2} )}{2}\\x=49 [m]\\](/tpl/images/0437/5484/63b63.png)
![v_{f} = v_{0} + (a*t)\\v_{f} = 23 [m/s]](/tpl/images/0437/5484/c001d.png)
Really need with these three similar physics questions as soon as !
1.) you are in pa...
Physics, 30.12.2019 22:31, shortyyashaun
Really need with these three similar physics questions as soon as !
1.) you are in paris, 60 m up in the eiffel tower. if you throw a euro downward at a velocity of 2.0 m/s, how long would it take the euro to hit the ground? neglect air resistance.
a. 3.3 s
b. 120 s
c. 41 s
d. 30. s
~~~
2.) a bicyclist passing through a city accelerates after he passes the signpost marking the city limits. his acceleration is constant at 6.0 m/s2. at time t1 = 0 s, he is at x1 = 7.0 m beyond the signpost and has a velocity v1 = 5.0 m/s.
find his position (distance from the signpost) 3 s after passing the signpost (at t = 3.0 s).
630 m
210 m
49 m
39 m
~~~
3.) a bicyclist passing through a city accelerates after he passes the signpost marking the city limits. his acceleration is constant at 6.0 m/s2. at time t1 = 0 s, he is at x1 = 7.0 m beyond the signpost and has a velocity v1 = 5.0 m/s.
find his velocity at t = 3.0 s.
210 m/s
156 m/s
23 m/s
15 m/s
Answers: 2
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