An object is dropped from rest from a height of 4.4 107 m above the surface of the Earth. If there is no air resistance, what is its speed when it strikes the Earth?
1 answer:
Answer:
Explanation:
An object is drop from a height, then it is in direction of gravity
g is +ve
When an object drop from a height, the initial velocity is 0,
U=0
Given that h=4.4×10^7m
V=?
g=9.81m/s^2
Then using equation of motion
V^2=U^2+2gh
V^2=0+2×9.81×4.4×10^7
V^2=86.33×10^7m/s
Take square root of both side
V=29381.63m/s
Now to km/s, divide by 1000
Since 1km=1000m
V=29.38km/s
You might be interested in
The exosphere is the layer of the atmosphere "Where gas molecules can be exchanged between Earth's atmosphere and outer space." Thus, the answer would be C.
i can <u>when do u need it by </u> working on it now!!!
Answer:
I think the answer is A
Explanation:
I need this brainliest answer please
The first question would be A
Answer:
Explanation:
We can use the equation for the speed
where x is the distance and t the time. In this case we know that the time spent was 2 hours and the distance was 150km. By replacing we have
I hope this useful for you
regards
