Find the frictional force between the two blocks- Take g -10 m - s 2-A- 5 NB- 6 N- 64 ND- 100 N

The correct option is B 6 NFrom FBD we write the force equation, N_1=8 g=80 N f_max=μ N_1=0.8 × 80 =64 N N_2=N_1+2g =8g + 2g=10g=100 N Assume them to move t ...

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Standard XII

Physics

Block on a Block Problems

Find the fric...

Question

Find the frictional force between the two blocks. Take $(g = 10 {m/s}^{2})$ .

5 N

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6 N

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64 N

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100 N

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Solution

The correct option is B $6 N$
From FBD we write the force equation,

$N_{1} = 8 g = 80 N$

$f_{max} = μ N_{1} = 0.8 \times 80$
$= 64 N$
$N_{2} = N_{1} + 2 g = 8 g + 2 g = 10 g = 100 N$
Assume them to move together with common acceleration

$a_{c} = \frac{F}{m_{1} + m_{2}} = \frac{30}{10} = 3 {m/s}^{2}$
For them to move together, required friction
$f = 2 a_{c} = 6 N$

But $f < f_{max}$ ; the frictional force $= 6 N$

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Find the frictional force between the two blocks. Take (g=10 m/s2).

The correct option is B 6 NFrom FBD we write the force equation, N1=8 g=80 N fmax=μN1=0.8×80 =64 N N2=N1+2g=8g+2g=10g=100 N Assume them to move together with common acceleration ac=Fm1+m2=3010=3 m/s2 For them to move together, required friction f=2ac=6 N But f<fmax; the frictional force =6 N

Find the frictional force between the two blocks. Take $(g = 10 {m/s}^{2})$ .