Question

The propeller on a boat pushes water backwards with a force Of 2000N.
through the water against a total resistive force of 1800 N.

According to Newton's third law, what is the forward force on the propeller due

A] 3800 N
B] 2000 N B
C] 1800 N C
D] 200 N

Answer 1

Explanation:

200 N

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Answer 2

The correct option to the above question will be (d), which is 200N.

Given: Force = 2000N

           Resistive force = 1800N

To find: force on the propeller

Solution:

• According to Newton's third law, every action has an equal and opposite reaction. Force is equal in magnitude and opposite in direction.
• Newtons Third law shows the property of force.
• There is a pair of force act on the interacting objects.

Resistive force = μN = 1800N

Backward force = 2000N

Forward force = Force - Resistive force

                       = 2000 - 1800

                       = 200N

Therefore, the forward force on the propeller due to 200N