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
The initial velocity of the particle is \(10\ \text{m/s}\) and its retardation is \(2\ \text{m/s}^2\). The distance moved by the particle in \(5^{th}\) second of its motion is:
1. \(1\ \text{m}\)
2. \(19\ \text{m}\)
3. \(50\ \text{m}\)
4. \(75\ \text{m}\)
A motor car moving with a uniform speed of \(20\ \text{m/s}\) comes to a stop on the application of the brakes after travelling a distance of \(10\ \text{m}\). Its acceleration is:
1. \(20\ \text{m/s}^2\)
2. \(-20\ \text{m/s}^2\)
3. \(-40\ \text{m/s}^2\)
4. \(+2\ \text{m/s}^2\)
The velocity of a body moving with a uniform acceleration of \(2\ \text{m/s}^2\) is \(10\ \text{m/s}\). Its velocity after an interval of \(4\ \text{s}\) is:
1. \(12\ \text{m/s}\)
2. \(14\ \text{m/s}\)
3. \(16\ \text{m/s}\)
4. \(18\ \text{m/s}\)
The initial velocity of a body moving along a straight line is \(7\ \text{m/s}\). It has a uniform acceleration of \(4\ \text{m/s}^2\). The distance covered by the body in the \(5^{th}\) second of its motion is:
1. \(25\ \text{m}\)
2. \(35\ \text{m}\)
3. \(50\ \text{m}\)
4. \(85\ \text{m}\)
The velocity of a body depends on time according to the equation \(𝑣 = 20 + 0 .1 \ 𝑡^ 2\). The body is undergoing:
1. Uniform acceleration
2. Uniform retardation
3. Non-uniform acceleration
4. Zero acceleration
Which of the following four statements is false?
1. A body can have zero velocity and still be accelerated.
2. A body can have a constant velocity and still have a varying speed.
3. A body can have a constant speed and still have a varying velocity.
4. The direction of the velocity of a body can change when its acceleration is constant.
The position of a particle moving in the XY plane at any time \(t\) is given by \(𝑥 = ( 3 𝑡^ 2 − 6 𝑡 )\) 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
If a body having initial velocity zero is moving with uniform acceleration \(8\ \text{m/s}^2\), then the distance travelled by it in the fifth second will be:
1. \(36\) metres
2. \(40\) metres
3. \(100\) metres
4. Zero