If your weight is 120 pounds and your mass is 54 kilograms how would those values change if you were on the moon
1 answer:
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Answer:
a) .
b) .
Explanation:
a) What is the speed of the rock just before it hits the street?
From Kinematics we have .
If we take the top of the roof as the position , then
and we have (also,
) :
⇒
⇒ .
b) How much time elapses from when the rock is thrown until it hits the street?
From Kinematics we have
When the rock touches the ground:
With a minus sign to indicate the vector velocity points down.
(remember that )
Answer:
D/H =15
Explanation:
- We can find first the peak height H, taking into consideration, that at the maximum height, the ball will reach momentarily to a stop.
- At this point, we can find the value of H, applying the following kinematic equation:
- If vf=0, if we assume that the positive direction is upwards, we can find the value of H as follows:
- We can use the same equation, to find the value of D, as follows:
- In order to find v₁, we can use the same kinematic equation that we used to get H, but now, we know that v₀ = 0.
- When we replace these values in (1), we find that v₁ = -v₀.
- Replacing in (3), we have:
- Solving for D:
- From (2) we know that H can be expressed as follows:
- ⇒ D = 15 * H