Question

during a test crash an airbag inflates to stop a dummies forward motion. the dummies mass is 75 kg. if the net force on the dummy is 825N toward the rear of the car what is the dummies deceleration

Answer 1

Answer:

Dummies deceleration is 11m/s²

Explanation:

According to Newton's second law, the relationship between the force applied to an object, its mass, and the acceleration (or deceleration) caused, is given by:

$F=ma$

Solving for acceleration:

$a=\frac{F}{m}$

If we plug in the vales (taking into account the negative sign of the force, as its directed backwards):

$a=\frac{-825N}{75kg}=-11m/s^2$

$a=-11m/s^2$

Deceleration is simply the magnitude of negative acceleration. Therefore, dummies deceleration is 11m/s²

Answer 2

Use Force=Mass x Acceleration (newtons second law states force is directly proportional to the acceleration) so you can say that the force is negative and solve for Acceleration.