What are the units for the constant G used in Newton\'s law of universal gravita

Question

What are the units for the constant G used in Newton's law of universal gravitation? (Nm^2)/kg^2 kg m/s^2 kg^2/m^2 N/m^2 None of these. If Newton's law of universal gravitation turned out to be Gm_i m_2/t rather than Gm_im_2/r^2 tides on earth A would still occur because each of the Earth feel a different gravitational force the moon would not happen because the force of gravity from the Moon would be too strong would not occur because the sun would still exist to help produce tides. would not occur because gravity would then be a repulsive force. A rock that weighs 100 lb on Earth is taken to the Moon As strange as it may seem, it is just as difficult to lift the 100 lb rock on the Moon as on the Earth. This is because the mass of the rock is independent of gravity, the weight of the rock is independent of gravity. Nonsense! The rock is more easily lifted on the Moon. An asteroid moving around the Sun happens to experience only negligible objects in the solar system. The path of this asteroid will be an ellipse. a parabola. a sinusoid. a straight line. A ball is whirled on the end of a string in a horizontal circle at constant speed. Suddenly, the string breaks. Immediately after the string breaks, the ball will have a horizontal velocity away from the center of the circle. have a velocity that is to the circle. have a horizontal velocity toward the center of the circle. have a horizontal velocity partly in away from the center of the circle and circle. have no horizontal velocity.

Explanation / Answer

6)

Units of G are (a) (Nm2)/kg2

7) A

8) C Nonsense! The rock is more easily lifted on the Moon.

9) A. an ellipse.

10. D. have a horizontal velocity that is tangential to the circle.

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