Question

The first five questions refer to the following problem:

A model rocket lifts off with an upward thrust of 35 Newtons. It has a mass of 2.5 kilograms and a weight of 25 Newtons. How quickly does the rocket accelerate?


Use your given quantities and your equations to solve the problem.


Question 5 options:


10 m/s^2


150m/s^2


24 m/s^2


4 m/s^2

Answer 1

The net force on the rocket is directed upward with a magnitude of

35 N - 25 N = 10 N

By Newton's second law, the acceleration a is such that net force is equal to the mass of the rocket times its acceleration:

10 N = (2.5 kg) a

a = (10 N) / (2.5 kg)

a = 4 m/s²