Activity 1. Let’s Solve!
1. A car that starts from rest suddenly accelerates with a constant value of 3.75m/s 2 within 15 seconds, what is the final velocity of the car?
(Use the formula: v f = v i + a t)
2. A coin was dropped on top of a building, neglecting air friction, it reached the ground after 8.8 seconds. How tall is the building?
(Use the formula: d = v i t + ½ a t 2 ; a g = -9.8 m/s 2)
(i would consider answering it with a solution, ty very much~, pls, refer to the picture also for clearer view)
1. A car that starts from rest suddenly accelerates with a constant value of 3.75m/s 2 within 15 seconds, what is the final velocity of the car?
(Use the formula: v f = v i + a t)
2. A coin was dropped on top of a building, neglecting air friction, it reached the ground after 8.8 seconds. How tall is the building?
(Use the formula: d = v i t + ½ a t 2 ; a g = -9.8 m/s 2)
(i would consider answering it with a solution, ty very much~, pls, refer to the picture also for clearer view)
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Answer:
1. 56.25m/s
2. 379.456m
Explanation:
1.
The Car Starts From The Rest, Vi=0
t= 15 s a=3.75m/s²
Vf=Vi+at
=0+3.75×15
=56.25m/s
Therefore, The Final Velocity Of The Car Is 56.25m/s
2.
Let, Height Of The Building=hm
Time Taken Reach Ground
t=8.8 sec
ag= -9.8m/s²
Initial Velocity Vi=0
d=Vit+½at²
h=0×8.8+½×9.8×8.8²
=379.456m
Therefore, The Building's Height Is 379.456m
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