Question

Th figure shows a block of mass $m$ moving without friction along three tracks with same speed $v$.

Choose the correct relation

• A. $N_1>N_2$
• B. $N_2>N_3$
• C. $N_3>N_1$
• D. $N_1=N_2=N_3$

Answer 1

Answer: (A), (C)

$N_3>N_1$

Case 1
$N_1=mg$
Case 2

$mg-N_2=\frac{m{v}^2}{r}$

Case 3$N_3=\frac{m{v}^2}{r}+mg$
$\therefore N_1>N_2;N_3>N_1$