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# A 1.5 kg particle starts from rest and moves a distance of 1.9 m in 1.2 s under the action of a single, constant force.?

A 1.5 kg particle starts from rest and moves a

distance of 1.9 m in 1.2 s under the action of

a single, constant force.

Find the magnitude of the force.

Answer in units of N.

### 1 Answer

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- az_lenderLv 72 months agoFavorite Answer
Since the acceleration is constant, the final speed will be twice the average speed. The average speed is

(1.9/1.2) m/s, and the final speed is (3.8/1.2) m/s, or 3.1667 m/s. Hence the constant acceleration is

(3.1667 m/s)/(1.2 s) = 2.639 m/s^2, and the force must be m*a = 3.96N.

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