Technician A says that the battery must be in good condition and at least 75% charged to accurately test an alternator. Technici
1 answer:
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Answer:
7572 m/s
Explanation:
The force between two masses separated by a distance r is given as:
Where F is the attractive force between 2 masses, m1 and m2, r is the distance between the centres of the masses and G is the universal gravitation constant, which is
The mass of the earth () is far greater than the mass of the sputnik (
). Therefore
. The mass of the sputnik is neglected, therefore:
But F is actually centripetal acceleration, a = v²/r
Answer: 4 s
Explanation:
Given
The ball leaves the hand of student with a speed of
When the hand is above the ground
Using the equation of motion we can write
Substitute the values
Thus, the ball will take 4 s to hit the ground.