A meteor having a mass of 1000 kg moves through outer space, far ...

[melly21297]

A meteor having a mass of 1000 kg moves through outer space, far from all planets and stars and far from all gravitational influences, at a speed of 20 km/s (20,000 m/s). How much work is done on the meteor during a time interval of one second?
 
  A) 20  106 J
  B) 20 J
  C) 1000 J
  D) 20 000 J
  E) None of the above.

Question 2

Enzo throws a rock horizontally with a speed of 12 m/s from a bridge. It falls for 2.28 s before reaching the water below with no appreciable air resistance. Just as the rock reaches the water, find
  (a) the horizontal component of its velocity.
 
  (b) the speed with which it is moving.

[abro1885]

Answer to Question 1

E

Answer to Question 2

(a) 12 m/s (b) 25 m/s

[melly21297]

Excellent

[nguyenhoanhat]

TYSM