Neutron stars, such as the one at the center of the Crab Nebula, have about the

Question

Neutron stars, such as the one at the center of the Crab Nebula, have about the same mass as our sun but a much smaller diameter.

Part A

If you weigh 670 N on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 16.0 km ?

Take the mass of the sun to be ms = 1.99×1030 kg , the gravitational constant to be G = 6.67×1011 Nm2/kg2 , and the acceleration due to gravity at the earth's surface to be g = 9.810 m/s2 .

Express your weight wstar in newtons.

Problem 4.62

An old building is being demolished by swinging a heavy metal ball from a crane. Suppose that such a 130 kg ball swings from a 20-m-long wire at speed 20m/s as the wire passes the vertical orientation

Part A

What tension force must the wire be able to withstand in order not to break?

Part B

Assume the ball stops after sinking 1.5 m into the wall. What was the average force that the ball exerted on the wall?

Express your answer with the appropriate units.

Explanation / Answer

acceleration due to gravity on neuron star=GM/R^2=5.184*10^11 m/s^2

acceleration que to gravity on earth=9.81 m/s^2

weight on earth=mass*acceleration due to gravity on earth

670=mass*9.81

mass=68.297 kg

weight on neuron =mass*acceleration due to gravity on neuron

weight= 3.54*10^(13) N

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