С A rocket of mass 1000 kg is travelling through the atmosphere.
The force due to its engine is 1200 N, and the drag force and friction equal 400 N.
The resultant force is 800 N. Calculate its acceleration.
Show your working and give the units. Use the equation:
force
acceleration =
mass

a = 0.8 [m/s²]

Explanation:

To solve this problem we must use Newton's second law which tells us that the resulting force on a body is equal to the product of mass by acceleration, in this way we come to the following equation:

∑F = m*a

where:

F = forces applied [N]

m = mass = 1000 [kg]

a = acceleration [m/s²]

Now using Newton's second law.

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