Sawyer launches his 180 kg raft on the mississippi river by pushing on it with a force of 75n. how long must sawyer push on the raft on to accelerate it to a speed 2 m/s?

4.8 s

Explanation:

We have the following data:

the mass of the raft

the force applied by Sawyer

the raft's final speed

the raft's initial speed (assuming it starts from rest)

We have to find the time

Well, according to Newton's second law of motion we have:

(1)

Where is the acceleration, which can be expressed as:

(2)

Substituting (2) in (1):

(3)

Where

Isolating from (3):

(4)

Finally:

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide