Question

○ both mass and weight decrease
○ both mass and weight stay the same

5 0/1 point formula
a 63 kg student is riding in an elevator that is traveling upward but slowing down at it reaches the top floor. if the acceleration of the elevator while it slows has a magnitude of 2.7 m/s/s, what is the apparent weight of the student during this time? round your answer to 1 decimal place if necessary.
170.1

6 1/1 point formula
a car (mass 1183 kg) traveling with a speed of 37 m/s comes to a stop on a horizontal surface over a distance of 53 m. what is average force exerted on the car by the brakes during this time? round your answer to the nearest whole number.
15,279

Explanation:

Step1: Define given values

$m = 63\ \text{kg}$, $g = 9.8\ \text{m/s}^2$, $a = 2.7\ \text{m/s}^2$ (downward, so negative for upward motion)

Step2: Use apparent weight formula

Apparent weight $W = m(g - a)$

Step3: Substitute values

$W = 63\times(9.8 - 2.7)$
$W = 63\times7.1$
$W = 447.3$

Answer:

447.3