chanice drives her scooter 7 kilometres north. she stops for lunch and then drives 5 kilometres east. what distance did she cove
1 answer:
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Answer:
e) Be four times greater
Explanation:
Here we have to use Newton's gravitational law that relates the gravitational force between two objects with their masses ( &
) and the distance between them (
) in the next way:
(2)
Now if distance between asteroids is halved:
Note that because (1) is F so:
It's four times greater!
To solve this problem we will apply the concepts related to the conservation of momentum. By definition we know that the initial moment must be equivalent to the final moment of the two objects therefore
Here,
Mass of each object
Initial velocity of each object
= Final velocity of each object
Since the initial velocity relative to the metal tank is at rest, that velocity will be zero. And considering that in the end, the speed of the two bodies is the same, the equation would become
Rearranging to find the velocity,
Replacing we have that,
Therefore the velocity of the shark immediately after it swallows the tank is
Explanation:
m = 19 oz × (28.3 g/1 oz) = 537.7 g
V = 92.8 mL