1. If an ice skater is heading north with a speed of 40 km/s, assuming the frict

Question

1. If an ice skater is heading north with a speed of 40 km/s, assuming the friction is zero on the ice and no more push is used, what do you think about the skater:

(a) going to slow down and stop eventually

(b) going to speed up

(c) going to change to other direction

(d) Heading north forever with the speed of 40 km/s

2. For the above question what kind of force applied to the skater?

(a) No force applied to the skater

(b) The resultant force applied to the skater is zero

(c) The gravity force and the earth support force are applied to the skater

(d) None of the above

Explanation / Answer

1) (d) Heading north forever with the speed of 40 km/s

2) (b) The resultant force applied to the skater is zero

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