Question

a constant retarding force of 10N is exerted to a body of mass 20 kg moving initially with a speed of 10m/s how long does the body take to stop?

please write it in a written form please its urgent

Answer 1

Step-by-step explanation:

$f = ma$

$10 = 20a$

$a = \frac{10}{20}$

$a = 0.5$

$a = \frac{v - u}{t}$

$0.5 = \frac{0 - 10}{t}$

$0.5t = - 10$

$t = \frac{ - 10}{0.5}$

$t = 20 \: sec$

THERE IS A SMALL CORRECTION ACCELERATION IS -0.5 AND MINUS GETS CANCELLED IN THE LAST STEP

MINUS HERE REPRESENTS THE OPPOSITE DIRECTION