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22. the launching velocity of a projectile is 20 m/s at 53 above the horizontal. What i the vertical component of its velocity at launch? Its horizontal component of air friction, which of these components remains constant throughout t of these components determines the projectiles time in the air? velocity? Neglecting hich he flight path? W uppose you exert 200 N horizontally on your refrigerator to push it acros the kitchen foor at constant velocity (a) How much work is done to push the refrigerator a distance of 55 m (b) What friction force acts between the refrigerator and the floor?

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