physics review

the mass of the moon is 7.3x10^2 kg and its radius is 1785 km. what is the strength of the gravitational field on the surface of the moon

• 9.8N/kg

• 1.5N/kg

• 7.3N/kg

• 6.5N/kg

which case of the following cases has a zero work done

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a rope is used to pull a metal box a distance of 20.0m across the floor. the rope is held at an angle of 50 with the floor , and a force of 303N is applied to the rope . how much work does the rope do on the box .

• 6060J

• 4642J

• 3895J

• 303000J

the SI unit of work is called a joule (J) what is one joules equal to?

• 1N/M^2

• 1N/M^2

• 1 N.M

• 1 N/M

which of the following is proportional to the square of the period of a planet orbiting the sun?

• the distance between the planet and the sun is cubed

• the mass of the sun

• the mass of the planet

• the product of the mass of the planet and the mass of the sun

in the figure below let F1 be the magnitude of the gravitational force exerted on the sun by the earth and F2 be the magnitude of the force exerted on the earth by the sun . whats the relation between F1 and F2

• F1 is slightly less than F2

• F1 is slightly greater than F2

• F1 is much greater than F2

• F1 is equal to F2

a boy lifts a 2.50kg book from his desk, which is 0.70m high , to a bookshelf that is 2.40m high. what is the potential energy of the book-Earth system relative to the desk when the book is on the shelf?

• 41.7J

• 76.0J

• 58.8J

• 6.00J

which of the following is used to calculate the rotational kinetic energy?

• 0.5xLxW

• 0.5xMxV

• mc^2

• -MxGxH

a 0.95 book with dimensions of 0.26m and 0.22m is at rest on a table, what pressure is applied by the book on the table ?

• 602 Pa

• 0.05 pa

• 16.6 Pa

• 163 Pa

coconut of mass falling of height of meters to the ground. which equation is correct for the kinetic and potential energies of the coconut at points A,B,C?

• PE(c)=KE(c)

• PE(c)>PE(b)>PE(a)

• KE(c)>KE(b)>KE(a)

• KE(a)>PE(a)