Question

An 88.0 kg astronaut is working on the engines of a spaceship that is drifting through space with a constant velocity. The astronaut turns away to look at Earth and several seconds later is 28.2 m behind the ship, at rest relative to the spaceship. The only way to return to the ship without a thruster is to throw a wrench directly away from the ship. If the wrench has a mass of 0.300 kg, and the astronaut throws the wrench with a speed of 18.0 m/s, how long does it take the astronaut to reach the ship?

Answer #1

Given,

mass of astronaut, m_{a} = 88 kg

distance from the spaceship, s = 28.2 m

mass of wrench, m_{w} = 0.3 kg

final velocity of the wrench, u = 18 m/s

final velocity of the astronaut, v = ?

All these values are given relative to the spaceship only

Using conservation of momentum {before throwing, both the astronaut and the wrench are at rest}

m_{a}*0 + m_{w}*0 = m_{a}*v +
m_{w}*u

putting all the values

88*0 + 0.33*0 = 88*v + 0.3*18

v = 0.06136 m/s

Now time taken to travel 28.2 m with this velocity is

t = d/v = 28.2/0.06136

t = 459.582 seconds = 7.66 minutes

A small spaceship whose mass is 1600 kg (including an astronaut)
is drifting in outer space with negligible gravitational forces
acting on it. If the astronaut turns on a 13 kW laser beam, what
speed will the ship attain in 5.0 days because of the momentum
carried away by the beam?

A small spaceship whose mass is 2100 kg (including an astronaut)
is drifting in outer space with negligible gravitational forces
acting on it. If the astronaut turns on a 13 kW laser beam, what
speed will the ship attain in 4.0 days because of the momentum
carried away by the beam?

An astronaut of mass 84.0 kg is taking a space walk to work on
the International Space Station. Because of a malfunction with the
booster rockets on his spacesuit, he finds himself drifting away
from the station with a constant speed of 0.550 m/s. With the
booster rockets no longer working, the only way for him to return
to the station is to throw the 7.65 kg wrench he is holding.
In which direction should he throw the wrench?
away...

In a science fiction movie, a lone astronaut with a mass of 75
kg is stranded outside their spaceship with a thruster pack that is
not working. They are stationary relative to their ship. In order
to get themselves moving they throw a 2.3 kg wrench at 15 m/s in
the opposite direction of the ship.
A. Draw before and after pictures for the astronaut and the
wrench labeling masses and velocities.
B. What is the speed of the astronaut...

home / study / science / physics / physics questions and answers
/ 1. an astronaut with a mass of 90 kg (including spacesuit and
equipment) is drifting away from ...
Your question has been answered
Let us know if you got a helpful answer. Rate this answer
Question: 1. An astronaut with a mass of 90 kg (including
spacesuit and equipment) is drifting away from hi...
1. An astronaut with a mass of 90 kg (including spacesuit and
equipment)...

Problem 3: Assume that an astronaut is stranded in space 12.0 m
from their spaceship and at they are at rest relative to the
spaceship (this is terrifying, try not to empathize). Knowing that
their flashlight makes a directed beam of light with intensity 950
W/m2 they turn it on and shine the light directly away from the
spacecraft so that it pushes them towards it. If the radius of the
light beam is 3.8 cm and the astronaut and...

An unfortunate astronaut loses his grip during a spacewalk and
finds himself floating away from the space station, carrying only a
rope and a bag of tools. First he tries to throw a rope to his
fellow astronaut, but the rope is too short. In a last ditch
effort, the astronaut throws his bag of tools in the direction of
his motion (away from the space station). The astronaut has a mass
of 102 kg and the bag of tools...

1. Dynamics and artificial gravity.
The space station has two thrusters pointed in opposite
directions. They operate by expelling propellant at high speed. The
effect is that there is a force of magnitude F0 on the
two ends of the space station in opposite directions, which causes
the entire object to start rotating. The thrusters will stop firing
when the artificial gravity created on the space station (described
below) reaches the required value.
Upward force, magnitude F0
Downward force, magnitude...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 24 minutes ago

asked 27 minutes ago

asked 41 minutes ago

asked 56 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago