270372
Displacements of\(1 \mathrm{~kg}\) and \(2 \mathrm{~kg}\) blocks upto that instant \(\left(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)
1 \(4 \mathrm{~m}\) towards right, \(7 \mathrm{~m}\) towards right
2 \(4 \mathrm{~m}\) towards left, \(7 \mathrm{~m}\) towards right
3 \(4 \mathrm{~m}\) towards left, \(7 \mathrm{~m}\) towards left
4 \(4 \mathrm{~m}\) towards right, \(7 \mathrm{~m}\) towards left
Explanation:
\(a=\mu g ; v=u+a t ; s=u t+\frac{1}{2} a t^{2}\)
Laws of Motion
270374
Three blocksare kept as shown in figure. Acceleration of \(20 \mathrm{~kg}\) block with respect to ground is
1 \(5 \mathrm{~ms}^{-2}\)
2 \(2 \mathrm{~ms}^{-2}\)
3 \(1 \mathrm{~ms}^{-2}\)
4 0
Explanation:
\(f_{1}=\mu_{1} m_{A} g, f_{2}=\mu_{2}\left(m_{A}+m_{B}\right) g ; f_{1}
Laws of Motion
270373
A\(2 \mathrm{~kg}\) block is pressed against a rough wall by a force \(F=20 \mathrm{~N}\) as shown in figure. find acceleration of the block and force of friction acting on it. (Take \(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}\) )
\(f_{s}=\mu_{s}m g ; W\lt f_{s} ; f_{k}=\mu_{k} m g ; a=\frac{F_{\text {net }}}{m}\)
Laws of Motion
270363
A block of mass \(m=4 \mathrm{~kg}\) is placed over a rough inclined plane having coefficient of friction \(\mu=0.6\) as shown in fig. A force \(F=\mathbf{1 0 N}\) is applied on the block at an angle \(30^{\circ}\). The contact force between the block and the plane is
1 \(10.65 \mathrm{~N}\)
2 \(16.32 \mathrm{~N}\)
3 \(27.15 \mathrm{~N}\)
4 \(32.16 \mathrm{~N}\)
Explanation:
Draw FBD,\(N+F \sin \alpha=m g \cos \theta\)
\(f=\mu N, R=\sqrt{N^{2}+f^{2}}\)
270372
Displacements of\(1 \mathrm{~kg}\) and \(2 \mathrm{~kg}\) blocks upto that instant \(\left(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)
1 \(4 \mathrm{~m}\) towards right, \(7 \mathrm{~m}\) towards right
2 \(4 \mathrm{~m}\) towards left, \(7 \mathrm{~m}\) towards right
3 \(4 \mathrm{~m}\) towards left, \(7 \mathrm{~m}\) towards left
4 \(4 \mathrm{~m}\) towards right, \(7 \mathrm{~m}\) towards left
Explanation:
\(a=\mu g ; v=u+a t ; s=u t+\frac{1}{2} a t^{2}\)
Laws of Motion
270374
Three blocksare kept as shown in figure. Acceleration of \(20 \mathrm{~kg}\) block with respect to ground is
1 \(5 \mathrm{~ms}^{-2}\)
2 \(2 \mathrm{~ms}^{-2}\)
3 \(1 \mathrm{~ms}^{-2}\)
4 0
Explanation:
\(f_{1}=\mu_{1} m_{A} g, f_{2}=\mu_{2}\left(m_{A}+m_{B}\right) g ; f_{1}
Laws of Motion
270373
A\(2 \mathrm{~kg}\) block is pressed against a rough wall by a force \(F=20 \mathrm{~N}\) as shown in figure. find acceleration of the block and force of friction acting on it. (Take \(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}\) )
\(f_{s}=\mu_{s}m g ; W\lt f_{s} ; f_{k}=\mu_{k} m g ; a=\frac{F_{\text {net }}}{m}\)
Laws of Motion
270363
A block of mass \(m=4 \mathrm{~kg}\) is placed over a rough inclined plane having coefficient of friction \(\mu=0.6\) as shown in fig. A force \(F=\mathbf{1 0 N}\) is applied on the block at an angle \(30^{\circ}\). The contact force between the block and the plane is
1 \(10.65 \mathrm{~N}\)
2 \(16.32 \mathrm{~N}\)
3 \(27.15 \mathrm{~N}\)
4 \(32.16 \mathrm{~N}\)
Explanation:
Draw FBD,\(N+F \sin \alpha=m g \cos \theta\)
\(f=\mu N, R=\sqrt{N^{2}+f^{2}}\)
270372
Displacements of\(1 \mathrm{~kg}\) and \(2 \mathrm{~kg}\) blocks upto that instant \(\left(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)
1 \(4 \mathrm{~m}\) towards right, \(7 \mathrm{~m}\) towards right
2 \(4 \mathrm{~m}\) towards left, \(7 \mathrm{~m}\) towards right
3 \(4 \mathrm{~m}\) towards left, \(7 \mathrm{~m}\) towards left
4 \(4 \mathrm{~m}\) towards right, \(7 \mathrm{~m}\) towards left
Explanation:
\(a=\mu g ; v=u+a t ; s=u t+\frac{1}{2} a t^{2}\)
Laws of Motion
270374
Three blocksare kept as shown in figure. Acceleration of \(20 \mathrm{~kg}\) block with respect to ground is
1 \(5 \mathrm{~ms}^{-2}\)
2 \(2 \mathrm{~ms}^{-2}\)
3 \(1 \mathrm{~ms}^{-2}\)
4 0
Explanation:
\(f_{1}=\mu_{1} m_{A} g, f_{2}=\mu_{2}\left(m_{A}+m_{B}\right) g ; f_{1}
Laws of Motion
270373
A\(2 \mathrm{~kg}\) block is pressed against a rough wall by a force \(F=20 \mathrm{~N}\) as shown in figure. find acceleration of the block and force of friction acting on it. (Take \(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}\) )
\(f_{s}=\mu_{s}m g ; W\lt f_{s} ; f_{k}=\mu_{k} m g ; a=\frac{F_{\text {net }}}{m}\)
Laws of Motion
270363
A block of mass \(m=4 \mathrm{~kg}\) is placed over a rough inclined plane having coefficient of friction \(\mu=0.6\) as shown in fig. A force \(F=\mathbf{1 0 N}\) is applied on the block at an angle \(30^{\circ}\). The contact force between the block and the plane is
1 \(10.65 \mathrm{~N}\)
2 \(16.32 \mathrm{~N}\)
3 \(27.15 \mathrm{~N}\)
4 \(32.16 \mathrm{~N}\)
Explanation:
Draw FBD,\(N+F \sin \alpha=m g \cos \theta\)
\(f=\mu N, R=\sqrt{N^{2}+f^{2}}\)
270372
Displacements of\(1 \mathrm{~kg}\) and \(2 \mathrm{~kg}\) blocks upto that instant \(\left(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)
1 \(4 \mathrm{~m}\) towards right, \(7 \mathrm{~m}\) towards right
2 \(4 \mathrm{~m}\) towards left, \(7 \mathrm{~m}\) towards right
3 \(4 \mathrm{~m}\) towards left, \(7 \mathrm{~m}\) towards left
4 \(4 \mathrm{~m}\) towards right, \(7 \mathrm{~m}\) towards left
Explanation:
\(a=\mu g ; v=u+a t ; s=u t+\frac{1}{2} a t^{2}\)
Laws of Motion
270374
Three blocksare kept as shown in figure. Acceleration of \(20 \mathrm{~kg}\) block with respect to ground is
1 \(5 \mathrm{~ms}^{-2}\)
2 \(2 \mathrm{~ms}^{-2}\)
3 \(1 \mathrm{~ms}^{-2}\)
4 0
Explanation:
\(f_{1}=\mu_{1} m_{A} g, f_{2}=\mu_{2}\left(m_{A}+m_{B}\right) g ; f_{1}
Laws of Motion
270373
A\(2 \mathrm{~kg}\) block is pressed against a rough wall by a force \(F=20 \mathrm{~N}\) as shown in figure. find acceleration of the block and force of friction acting on it. (Take \(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}\) )
\(f_{s}=\mu_{s}m g ; W\lt f_{s} ; f_{k}=\mu_{k} m g ; a=\frac{F_{\text {net }}}{m}\)
Laws of Motion
270363
A block of mass \(m=4 \mathrm{~kg}\) is placed over a rough inclined plane having coefficient of friction \(\mu=0.6\) as shown in fig. A force \(F=\mathbf{1 0 N}\) is applied on the block at an angle \(30^{\circ}\). The contact force between the block and the plane is
1 \(10.65 \mathrm{~N}\)
2 \(16.32 \mathrm{~N}\)
3 \(27.15 \mathrm{~N}\)
4 \(32.16 \mathrm{~N}\)
Explanation:
Draw FBD,\(N+F \sin \alpha=m g \cos \theta\)
\(f=\mu N, R=\sqrt{N^{2}+f^{2}}\)
