A net horizontal force of 2000 N is applied to an 800-kg car at rest. The car's speed after 5 s will be
A) 1.3 m/s.
B) 2.5 m/s.
C) 6.25 m/s.
D) 12.5 m/s.

Question

Quizplus · Accepted Answer

The acceleration of the car can be calculated using Newton's second law, $F = ma$, where $F$ is the force applied, $m$ is the mass of the car, and $a$ is the acceleration. Substituting the given values, $2000 \, \text{N} = 800 \, \text{kg} \cdot a$, we find $a = 2.5 \, \text{m/s}^2$. The speed of the car after 5 seconds can be found using the formula $v = at$, where $v$ is the final velocity, $a$ is the acceleration, and $t$ is the time. Substituting the values, $v = 2.5 \, \text{m/s}^2 \cdot 5 \, \text{s} = 12.5 \, \text{m/s}$.

A Net Horizontal Force of 2000 N Is Applied to an 800-Kg