esperanzar3034
20.08.2019 •
Physics
Astudent pushes a 2.85 kg cart causing it to accelerate at a rate of 4.9 m/s squared .what amount of force must the student have used? (2 sig digs)
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Ответ:
F=ma
where m is mass and a is acceleration.
In the problem, the mass is 2.85kg and the acceleration is 4.9m/s^2.
Therefore,
F=2.85kg(4.9m/s^2)
F=13.965kg(m/s^2)
Since N=kg(m/s^2)
F=13.965N
And because the problem requires that we use only 2 significant figures,
F=13N
Therefore, the student must exert 13N of force.
Ответ:
3.3013x10^2
Explanation: