1) The distance between the sun and earth is 1.5 x 1011 m and the earths...

1) The distance between the sun and earth is 1.5 x 1011 m and the earths orbital speed is 3x104m/s . Use this information to calculate the mass of the Sun. (G = 6.67 x 10-11 N m2/kg2).

2. If a disk is rotating at 1200 rev/min what is the angular velocity in rad/sec, what angular (dece)acceleration is required to stop it in 3 min. What torque will do this? Assume the mass of the disk is 3kg and radius 20cm.

3. A high powered rifle of mass 5kg fires a 15-g bullet with a muzzle velocity of 3 x 10 ⁴ cm/sec. What is the recoil velocity of the rifle? (Hint use momentum conservation before and after firing).

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genius_generous answered 1 year ago

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