An astronaut stands on the surface of an asteroid. The astronaut then jumps such that the astronaut is no longer in contact with
the surface. The astronaut falls back down to the surface after a short time interval. Which of the following forces CANNOT be neglected when analyzing the motion of the astronaut?
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I can't answer this question without a figure. I've found a similar problem as shown in the first picture attached. When adding vectors, you don't have to add the magnitudes only, because vectors also have to factor in the directions. To find the resultant vector C, connect the end tails of the individual vectors. <em>The red line (second picture) represents the vector C.</em>
To develop this problem we will apply the concepts related to the conservation of momentum. For this purpose, the initial momentum will be equivalent to the initial momentum of the two objects when they have the same speed. Mathematically this can be expressed as,
Where,
= Mass of bullet
= Velocity of bullet
= Mass of wooden block
Velocity of Wooden block
Inititally then we have that the expression can be rearrange to find the velocity of the bullet,
Replacing with our values
Therefore the velocity of the bullet before striking the block is 319.6m/s