Question

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A man is descending in a parachute of total weight 125 N with a constant velocity. What is the air resistance the parachutist experiences?

-125N

A block of mass 5 kg is descending with a constant velocity on an inclined plane at 30°. What is the value of the frictional force?

- 24.5N

A block of mass 5 kg is placed on a rough table having a coefficient of static friction μs = 0.2.What is the force required to move the block?

-9.8N

Answer 1

Emily leaves her physics book of mass 1 kg on the top of the table that is inclined at an angle of 20°. What is the acceleration of the book if the coefficient of kinetic friction between the book and the inclined plane is 0.3?

- 0.5 m/s

A man pulls a suitcase of mass 15 kg with a force "F" inclined at an angle of 60° to the horizontal. The frictional force between the floor and the wheels of the suitcase is 10 N. What is the force required to produce an acceleration of 0.1 m/s2 on the suitcase?

- 23.0 N

Two physics books, A and B, are placed on top of each other on a table. Book A's mass is 2 kg and book B's mass is 1 kg. Book A is placed on book B. What is the reaction book B exerts onto book A?

- 9.8 N downwards

Answer 2

@Luigi0210 @zepdrix

Answer 3

@Kainui @bibby

Answer 4

For the last one...