A body starts from the origin and moves along the X-axis such that the velocity at any instant is given by \( ( 4 π‘^ 3 β 2 π‘ )\), where \(t\) is in sec and velocity in m/s. What is the acceleration of the particle when it is \(2\ \text{m}\) from the origin?
1. \(28\ \text{m/s}^2\)
2. \(22\ \text{m/s}^2\)
3. \(12\ \text{m/s}^2\)
4. \(10\ \text{m/s}^2\)
The acceleration of a moving body can be found from:
1. Area under the velocity-time graph
2. Area under the distance-time graph
3. Slope of the velocity-time graph
4. Slope of the distance-time graph
A particle starting from rest, moving with constant acceleration, travels a distance \(x\) in first \(2\) seconds and a distance \(y\) in the next two seconds, then:
1. \(y = x\)
2. \(y = 2x\)
3. \(y = 3x\)
4. \(y = 4x\)
The velocity of a body depends on time according to the equation \(π£ = 20 + 0 .1 \ π‘^ 2\). The body is undergoing:
1. Uniform acceleration
2. Uniform retardation
3. Non-uniform acceleration
4. Zero acceleration
The position of a particle moving in the XY plane at any time \(t\) is given by \(π₯ = ( 3 π‘^ 2 β 6 π‘ )\) metres, \(y=(t^2-2t)\) metres. Select the correct statement about the moving particle from the following.
1. The acceleration of the particle is zero at \(t = 0\) second
2. The velocity of the particle is zero at \(t = 0\) second
3. The velocity of the particle is zero at \(t = 1\) second
4. The velocity and acceleration of the particle are never zero
Two cars \(A\) and \(B\) are travelling in the same direction with velocities \(v_1\) and \(v_2 (v_1>v_2)\). When the car \(A\) is at a distance \(d\) behind car \(B\), the driver of the car \(A\) applied the brake producing uniform retardation \(a\). There will be no collision when:
1. \(d< \dfrac{(v_1-v_2)^2}{2a}\)
2. \(d< \dfrac{v^2_1-v^2_2}{2a}\)
3. \(d> \dfrac{(v_1-v_2)^2}{2a}\)
4. \(d> \dfrac{v^2_1-v^2_2}{2a}\)
A body moves from rest with a constant acceleration of \(5\ \text{m/s}^2\). Its instantaneous speed (in m/s) at the end of \(10\ \text{s}\) is
1. \(50\)
2. \(5\)
3. \(2\)
4. \(0.5\)
The acceleration \(a\) in m/s2 of a particle is given by where t is the time. If the particle starts out with a velocity, \(u=2\) m/s at t = 0, then the velocity at the end of \(2\) seconds will be:
1. \(12\) m/s
2. \(18\) m/s
3. \(27\) m/s
4. \(36\) m/s
The displacement of a particle starting from rest (at \(t = 0\)) is given by \(π = 6 π‘^ 2 β π‘^ 3\). The time in seconds at which the particle will attain zero velocity again is:
1. \(2\)
2. \(4\)
3. \(6\)
4. \(8\)