270149
An impulse "I" given to a body changes its velocity from " \(v_{1}\) to \(v_{2}\) ". The increase in the kinetic energy of the body is given by
1 \(I\left(v_{1}+v_{2}\right)\)
2 \(I\left(v_{1}+v_{2}\right) / 2\)
3 \(I\left(v_{1}-v_{2}\right)\)
4 \(I\left(v_{1}-v_{2}\right) / 2\)
Explanation:
\(\Delta K E=\frac{1}{2} m\left(v_{2}^{2}-v_{1}^{2}\right), J=\Delta p=m(v-u)\)
Laws of Motion
270240
A particle of mass\(m\), initially at rest is acted upon by a variable force \(F\) for a brief interval of time T. It begins to move with a velocity u after the force stops acting. \(F\) is shown in the graph as a function of time. The curve is a semicircle. Then
1 \(u=\frac{\pi F_{0}^{2}}{2 m}\)
2 \(u=\frac{\pi T^{2}}{8 m}\)
3 \(u=\frac{\pi F_{0} T}{4 m}\)
4 \(u=\frac{\pi F_{0} T}{2 m}\)
Explanation:
\(\quad\) Impulse \(=\) Area of semi circle
Laws of Motion
270241
A ball of mass\(0.2 \mathrm{~kg}\) strikes an obstacle and moves at \(60^{\circ}\) to its original direction. If its speed also changes from \(20 \mathrm{~m} / \mathrm{s}\) to \(10 \mathrm{~m} / \mathrm{s}\), the magnitude of the impulse received by the ball is
270307
A particle of mass \(m\) moving with velocity \(u\) makes an elastic one-dimensional collision with a stationary particle of mass \(\mathrm{m}\). They are in contact for a very brief time \(T\). Their force of interaction increases from zero to \(F_{0}\) linearly
270149
An impulse "I" given to a body changes its velocity from " \(v_{1}\) to \(v_{2}\) ". The increase in the kinetic energy of the body is given by
1 \(I\left(v_{1}+v_{2}\right)\)
2 \(I\left(v_{1}+v_{2}\right) / 2\)
3 \(I\left(v_{1}-v_{2}\right)\)
4 \(I\left(v_{1}-v_{2}\right) / 2\)
Explanation:
\(\Delta K E=\frac{1}{2} m\left(v_{2}^{2}-v_{1}^{2}\right), J=\Delta p=m(v-u)\)
Laws of Motion
270240
A particle of mass\(m\), initially at rest is acted upon by a variable force \(F\) for a brief interval of time T. It begins to move with a velocity u after the force stops acting. \(F\) is shown in the graph as a function of time. The curve is a semicircle. Then
1 \(u=\frac{\pi F_{0}^{2}}{2 m}\)
2 \(u=\frac{\pi T^{2}}{8 m}\)
3 \(u=\frac{\pi F_{0} T}{4 m}\)
4 \(u=\frac{\pi F_{0} T}{2 m}\)
Explanation:
\(\quad\) Impulse \(=\) Area of semi circle
Laws of Motion
270241
A ball of mass\(0.2 \mathrm{~kg}\) strikes an obstacle and moves at \(60^{\circ}\) to its original direction. If its speed also changes from \(20 \mathrm{~m} / \mathrm{s}\) to \(10 \mathrm{~m} / \mathrm{s}\), the magnitude of the impulse received by the ball is
270307
A particle of mass \(m\) moving with velocity \(u\) makes an elastic one-dimensional collision with a stationary particle of mass \(\mathrm{m}\). They are in contact for a very brief time \(T\). Their force of interaction increases from zero to \(F_{0}\) linearly
270149
An impulse "I" given to a body changes its velocity from " \(v_{1}\) to \(v_{2}\) ". The increase in the kinetic energy of the body is given by
1 \(I\left(v_{1}+v_{2}\right)\)
2 \(I\left(v_{1}+v_{2}\right) / 2\)
3 \(I\left(v_{1}-v_{2}\right)\)
4 \(I\left(v_{1}-v_{2}\right) / 2\)
Explanation:
\(\Delta K E=\frac{1}{2} m\left(v_{2}^{2}-v_{1}^{2}\right), J=\Delta p=m(v-u)\)
Laws of Motion
270240
A particle of mass\(m\), initially at rest is acted upon by a variable force \(F\) for a brief interval of time T. It begins to move with a velocity u after the force stops acting. \(F\) is shown in the graph as a function of time. The curve is a semicircle. Then
1 \(u=\frac{\pi F_{0}^{2}}{2 m}\)
2 \(u=\frac{\pi T^{2}}{8 m}\)
3 \(u=\frac{\pi F_{0} T}{4 m}\)
4 \(u=\frac{\pi F_{0} T}{2 m}\)
Explanation:
\(\quad\) Impulse \(=\) Area of semi circle
Laws of Motion
270241
A ball of mass\(0.2 \mathrm{~kg}\) strikes an obstacle and moves at \(60^{\circ}\) to its original direction. If its speed also changes from \(20 \mathrm{~m} / \mathrm{s}\) to \(10 \mathrm{~m} / \mathrm{s}\), the magnitude of the impulse received by the ball is
270307
A particle of mass \(m\) moving with velocity \(u\) makes an elastic one-dimensional collision with a stationary particle of mass \(\mathrm{m}\). They are in contact for a very brief time \(T\). Their force of interaction increases from zero to \(F_{0}\) linearly
270149
An impulse "I" given to a body changes its velocity from " \(v_{1}\) to \(v_{2}\) ". The increase in the kinetic energy of the body is given by
1 \(I\left(v_{1}+v_{2}\right)\)
2 \(I\left(v_{1}+v_{2}\right) / 2\)
3 \(I\left(v_{1}-v_{2}\right)\)
4 \(I\left(v_{1}-v_{2}\right) / 2\)
Explanation:
\(\Delta K E=\frac{1}{2} m\left(v_{2}^{2}-v_{1}^{2}\right), J=\Delta p=m(v-u)\)
Laws of Motion
270240
A particle of mass\(m\), initially at rest is acted upon by a variable force \(F\) for a brief interval of time T. It begins to move with a velocity u after the force stops acting. \(F\) is shown in the graph as a function of time. The curve is a semicircle. Then
1 \(u=\frac{\pi F_{0}^{2}}{2 m}\)
2 \(u=\frac{\pi T^{2}}{8 m}\)
3 \(u=\frac{\pi F_{0} T}{4 m}\)
4 \(u=\frac{\pi F_{0} T}{2 m}\)
Explanation:
\(\quad\) Impulse \(=\) Area of semi circle
Laws of Motion
270241
A ball of mass\(0.2 \mathrm{~kg}\) strikes an obstacle and moves at \(60^{\circ}\) to its original direction. If its speed also changes from \(20 \mathrm{~m} / \mathrm{s}\) to \(10 \mathrm{~m} / \mathrm{s}\), the magnitude of the impulse received by the ball is
270307
A particle of mass \(m\) moving with velocity \(u\) makes an elastic one-dimensional collision with a stationary particle of mass \(\mathrm{m}\). They are in contact for a very brief time \(T\). Their force of interaction increases from zero to \(F_{0}\) linearly
