Which star has the largest proper motion? Why?

What will be an ideal response?


Barnard's Star lies only about 6 light-years away, and the direction of its motion has a large component perpendicular to our line of sight.

Physics & Space Science

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Why does the Milky Way appear as a band of light in the sky?

What will be an ideal response?

Physics & Space Science

Jake pulls on a 25-kg cart with a constant force of 50 N. What is the wagon's acceleration?

A) 0.2 m/s2 B) 2.0 m/s2 C) 5 m/s2 D) 20 m/s2 E) 200 m/s2

Physics & Space Science

During a hockey game, a puck is given an initial speed of 10 m/s. It slides 50 m on the horizontal ice before it stops due to friction. What is the coefficient of kinetic friction between the puck and the ice?

A) 0.090 B) 0.10 C) 0.11 D) 0.12

Physics & Space Science

A 5.0-m long, 12-kg, ladder rests against a smooth vertical wall with the bottom of the ladder 3.0 m from the wall. The coefficient of static friction between the floor and the ladder is 0.28

What distance, measured along the ladder from the bottom, can a 60-kg person climb before the ladder starts to slip? A) 4.0 m B) 3.7 m C) 1.7 m D) 1.3 m E) 3.3 m

Physics & Space Science