Physics

An astronaut of mass m in a spacecraft experiences a gravitational force F=mg when stationary on the launchpad.
What is the gravitational force on the astronaut when the spacecraft is launched vertically upwards with an acceleration of 0.2g?

A 1.2mg
B mg
C 0.8mg
D 0

Ans= B
Someone explain pleaseeee!
And working too!
Thanks!

  1. 👍 3
  2. 👎 1
  3. 👁 3,536
  1. The answer is B because, in reality, the force of gravity on astronauts, just depends on their masses which do not change, though the spacecraft is subjected to an acceleration upward.
    Due to the acceleration of the spacecraft, is exerted on the astronaut additional acceleration equal to 0.2 g. In this case the astronaut has a greater apparent weight, which is equal to 1.2 mg although the gravitational force of the earth on the mass of the astronaut is still mg. Let's see this with the second law of Newton.
    By Newton's second law we have:
    ∑ F = ma
    The forces acting on an astronaut are the force of gravity or the weight, directed downward, and the force of the rocket boosters Fr, directed upwards. Then we can write:
    Fr – mg = ma
    Where (a = 0.2g) is the acceleration of the spacecraft ; so we have:
    Fr = ma + mg → Fr = m(a + g) → Fr = m(0.2g + g) → Fr = 1.2mg
    Fr is the apparent gravitational force (apparent weight) experienced by astronauts

    1. 👍 8
    2. 👎 8
  2. Gravitational force does not alter when the spacecraft is launched. So it is B

    1. 👍 8
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    A 70.0-kg astronaut pushes to the left on a spacecraft with a force in "gravity-free" space. The spacecraft has a total mass of 1.0 × 104 kg. During the push, the astronaut accelerates to the right with an acceleration of 0.36

  2. Science Physics

    On the surface of the Moon an astronaut has a weight of Fg = 120 N. The radius of the Moon is Rm = 1.74 x 106 m, the gravitational constant is G = 6.67 x 10-11 N m2kg2 and the mass of the Moon is Mm = 7.35 x 1022 kg. Solve

  3. physics

    A space habitat for a long space voyage consists of two cabins each connected by a cable to a central hub as shown in the figure below. The cabins are set spinning around the hub axis, which is connected to the rest of the

  4. Physics

    A spacecraft in the shape of a long cylinder has a length of 100 m, and its mass with occupants is 1770 kg. It has strayed too close to a black hole having a mass 109 times that of the Sun. The nose of the spacecraft points toward

  1. Aths

    Suppose you are an astronaut spacewalking outside your spacecraft to repair a broken part. In fixing the part, you have drifted several meters from your spacecraft. You are now at rest and are still holding a bag filled with

  2. physics

    An astronaut whose mass is 80. kg carries an empty oxygen tank with a mass of 10. kg. The astronaut throws the tank away with a speed of 2.0 m/s. With what velocity does the astronaut start to move off into space?

  3. Physics 1

    An astronaut in her space suit has a total mass of m1 = 76.9 kg, including suit and oxygen tank. Her tether line loses its attachment to her spacecraft while she's on a spacewalk. Initially at rest with respect to her spacecraft,

  4. space/astronomy

    Rank the objects based on the strength of the gravitational force that would be felt by a spacecraft traveling at a distance of 10 AU from the center of each of the objects, from weakest to strongest. 1)red giant mass: 1Msun

  1. physics

    The Moon has a mass of 7.35  1022 kg and its equatorial radius is 1.74  106 m. Earth’s mass is 5.97  1024 kg and its equatorial radius is 6.38  106 m. (a) Calculate the magnitude of the gravitational force exerted by i) the

  2. science

    An astronaut of mass 120 kg recedes from her spacecraft by activating a small propulsion unit attached to her back. The force generated by a spurt is 30 N. Show that her acceleration is 0.25 m/s2.

  3. Physics

    A 115kg astronaut throws an 18kg tool kit at 4.6m/s away from a spacecraft in deep space. Show that the astronaut will recoil at a speed of 0.72m/s

  4. Physics Homework Check !!PLSS!!

    1. Which list presents the four fundamental forces in order of relative strength from weakest to strongest? A. electromagnetism, weak nuclear, gravitational, strong nuclear B. gravitational, weak nuclear, electromagnetism, strong

You can view more similar questions or ask a new question.