# physics

posted by .

The earth exerts a downward force of 850 N on a veteran astronaut as he works outside the space shuttle. What force (if any) does the astronaut exert on the earth?

• physics -

Don't forces always have equal and opposite forces? Newtons third law says something about that.

When you stand on a scale, and it reads 100 lbs. Turn it upside down, let the Earth read its weight: 100 lbs, in the opposite direction.

## Similar Questions

1. ### Physics

A 95 kg astronaut and a 1500 kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.15 m/s directly away from the shuttle. Seven-and-a-half seconds later the astronaut …
2. ### Physics

A 90 kg astronaut and a 1100 kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.24 m/s directly away from the shuttle. Seven-and-a-half seconds later the astronaut …
3. ### physics

Right after clearing the launch tower, the space shuttle is accelerating upward at 6 m/s/s. Calculate the net force on an 80 kg astronaut during this acceleration and the force that the seat must exert on the astronaut during this …
4. ### help! physics

Right after clearing the launch tower, the space shuttle is accelerating upward at 6 m/s/s. Calculate the net force on an 80 kg astronaut during this acceleration and the force that the seat must exert on the astronaut during this …
5. ### physics

A 82-kg astronaut and a 1300-kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.24 m/s directly away from the shuttle. Seven-and-a-half seconds later the astronaut …
6. ### physics

A 94- astronaut and a 1200- satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.25 directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into …
7. ### physics

A 88-kg astronaut and a 1200-kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.25m/s directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes …
8. ### Physics

When the space shuttle (mass of the shuttle = 2 x10^6 kg) was at the outer limit of Earth's atmosphere (distance = 350 km above Earth's surface), astronauts measured the gravitational force from Earth to be equal to 1.7 x 10^7 newtons. …
9. ### Physics

A 97kg astronaut and a 1100kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.13m/s directly away from the shuttle. Seven and a half seconds later the astronaut comes …
10. ### Physics 20

Astronauts in orbit appear to be 'weightless'.Suppose an astronaut with a mass of 154 KG including gear is in orbit in the space shuttle, a distance of 222 km above the Earth;s surface.Taking the Earth's radius to be 6371km, and its …

More Similar Questions