Anonymous
Anonymous asked in Science & MathematicsPhysics · 1 decade ago

A loaf of bread weighs 5.3 N on Earth.?

a) What would it weigh, in newtons, on Mars, where the acceleration due to gravity is .378 times that on Earth?

b) What would it weigh on Neptune, where gravity is 1.14 times that on Earth?

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  • 1 decade ago
    Favorite Answer

    F = ma

    First we need to find the objects mass and we know that F=5.3N and a=9.81m/s² on earth. So we have the following:

    5.3N = m * 9.81m/s²

    So solve for m.

    m = 5.3/9.81

    m = .54 kg

    A) So now we go to Mars. We're trying to find its weight in Newtons. We know m = .54kg and a=9.81*.378 (Since the acceleration due to gravity is .378 times that of earth.) So we have:

    F = .54kg * (9.81*.378)m/s²

    F = .54kg * 3.70818m/s²

    F = 2.002 N

    So the weight on Mars would be 2.002 N.

    B) Now we go to Neptune. We know the following: m = .54kg and a=9.81 * 1.14. So we have:

    F = .54kg * (9.81*1.14)m/s²

    F = .54kg * 11.1834m/s²

    F = 6.039 N

    So the weight on Neptune is 6.039 N.

    Hope this has helped.

  • 1 decade ago

    weight is defined as mass X acc due to gravity

    Acoording to law of conservation of mass

    mass can neighter be destroyed nor created

    so the mass of body is same on earth as well as on neptune

    at earth acc due to gravity is 10m/s2 (actually 9.81)

    mass of bread is

    5.3 / 10 = .53 kg

    now weight on mars

    .53 X (.379) X 10

    on neptune

    .53 X (1.14) X 10

  • Anonymous
    4 years ago

    A) Since F = m*a, if you divide the gravity by 6, you divide the weight by 6. B) If you multiply the gravity by 2.64, you multiply the weight (force of gravity) by 2.64.

  • 1 decade ago

    g on earth is 9.81 m/s^2

    .378 * 9.81 = 8.708 = g on Mars

    Now, m = 5.3/ 9.81 = .5403 Kg

    F(Mars)= g(mars) * m = 8.708 * .5403 (N)

    1.14 * 9.81 = 11.183 = g on Neptune

    F(Neptune) = 11.183 * .5403 (N) on Neptune

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  • 1 decade ago

    5.3*0.378 = 2.0034N

    5.3 * 1.14 = 6.042

  • nobody
    Lv 5
    1 decade ago

    maybe nothing

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