Question

A body starts to slide over a horizontal surface with an initial velocity of 0.5 m/s. Due to friction, its velocity decreases at the rate 0.105 m/s² . How much time will it take for the body to stop?

Answer 1

Using the first equation of motion: v = u + at

where: v = final velocity = 0 m/s

u = initial velocity = 0.5 m/s 

a = acceleration = -0.105 m/s² 

t = time = ?? 

v = u + at 

0 = 0.5 - 0.105 x t0.105 x t = 0.5 

t =\(\frac{0.5}{0.105}\) s =4.76 s