For all questions, take g = 9.81 m/^s, G = 6.674 times 10-11 m^3kg^-1s^-2, mass

Question

For all questions, take g = 9.81 m/^s, G = 6.674 times 10-11 m^3kg^-1s^-2, mass of the earth = 5.972 times 10^24 kg A crate of mass 3.0 kg sits on a ramp inclined at 18* to the horizontal. What is the normal force applied by the ramp on the crate 27.99 N 40.75 42.33 N 23.69 N What is the approximate gravitational force between the earth and one of the voyager spacecraft when they arc separated by 10 billion km? The spacecraft has a mass of 750 kg during the mission: 2.1 times 10^-9 N 3.2 times 10^-9 N 4.4 times 10^-9 N 3.0 times 10^-9 N A large is hauled along a straight-line section of canal by two horses harnessed to tow ropes and walked along the tow paths on either side of the canal. Each horse pulls with a force of 700 N at an angle of 12.5 degree with the centerline of the canal. Find the net force on the barge, in kilonewtons. Round your answer to three significant digits. 1.37 3.21 2.25 1.97 Which of the fundamental forces attracts the electrons to the nucleus of an atom: Electromagnetic force Strong force Weak force Gravitational force The velocity-time graph for an object is shown below. Identify the correct acceleration-time graph:

Explanation / Answer

1)

Normal force

N = mg cos18

N = 27.99 N ( answer A)

4)

the forces that act inside the atoms is weak forces

weak forces (option C)

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