Answer:
0.9m/s^2 (yours is 0.87, so choose that)
Explanation:
formula for centripetal acceleration:
v^2/r
to find v, we know that f=1/90s, and r=180m.
v=(2pir)/T
v=(2pi(180))/90
v=12.6m/s
now plug into a=v^2/r
a=(12.6)^2/180
a=0.9m/s^2

Every object in the universe attracts every other object with a force which is proportional to the product of their masses and inversely proportional to the square of the distance between them. The forces along the line joining the centre of the two objects.
❍ Let us consider two masses m1 and m2 line at a separation distance d. Let the force of attraction between the two objects be F.
According to universal law of gravitation,

Also,

Combining both, We will get

Or, We can write it as,

Where, G is the constant of proportionality and it is called 'Universal Gravitational constant'.
☯️ Hence, derived !!
<u>━━━━━━━━━━━━━━━━━━━━</u>
Answer:
2s
Explanation:
The position function of the motion can be expressed as:

where
is the origin where the particle starts off,
and a = <1,2,0> m/s2. In the 3-coordinate system it can be written as

For the particle to hit the 2x+y-z=4 plane then its coordinates must meet that criteria



t = 2 or t = -1
Since t can only be positive we will pick t = 2s
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Answer: 3rd option
Explanation: Since it has less mass and same force as other object it will have higher acceleration