Question

Calculate the maximum acceleration of a moving car so that a body lying on the floor of the car remains stationary. The coefficient of static friction between the body and the floor is 0.15 (g=10ms-2).

• A. 150 ms-2
• B. 1.5 ms-2
• C. 50 ms-2
• D. 1.2 ms-2

Answer 1

Answer: (B)

1.5 ms-2

Answer 2

The correct option is (B): 1.5 ms-2

$F_s=ma$

$f_L=ma_{max}$

$\mu\,mg=ma_{max}$

$a_{max}=\mu g$

$=0.15(10)$

$=1.5\,m/s^2$