The acceleration \(a\) (in ) of a body, starting from rest varies with time \(t\) (in \(\mathrm{s}\)) as per the equation \(a=3t+4.\) The velocity of the body at time \(t=2\) \(\mathrm{s}\) will be:
1. \(10\)
2. \(18\)
3. \(14\)
4. \(26\)
A point moves in a straight line under the retardation a. If the initial velocity is \(\mathrm{u},\) the distance covered in \(\mathrm{t}\) seconds is:
1.
2.
3.
4.
A body starts from the origin and moves along the X-axis such that the velocity at any instant is given by , where t is in sec and velocity in m/s. What is the acceleration of the particle, when it is 2 m from the origin ?
1. 28 m/s2
2. 22 m/s2
3. 12 m/s2
4. 10 m/s2
The initial velocity of a particle is u (at t = 0) and the acceleration f is given by at. Which of the following relation is valid
1.
2.
3.
4. v = u
The velocity of a body depends on time according to the equation . The body is undergoing
1. Uniform acceleration
2. Uniform retardation
3. Non-uniform acceleration
4. Zero acceleration
The displacement of a particle is given by . The initial velocity and acceleration are, respectively:
1. | \(\mathrm{b}, ~\mathrm{-4d}\) | 2. | \(\mathrm{-b},~ \mathrm{2c}\) |
3. | \(\mathrm{b}, ~\mathrm{2c}\) | 4. | \(\mathrm{2c}, ~\mathrm{-2d}\) |
A body is thrown vertically upwards. If the air resistance is to be taken into account, then the time during which the body rises is:
1. | Equal to the time of fall |
2. | Less than the time of fall |
3. | Greater than the time of fall |
4. | Twice the time of fall |
The acceleration of a particle is increasing linearly with time t as bt. The particle starts from the origin with an initial velocity of v0. The distance travelled by the particle in time t will be:
(1)
(2)
(3)
(4)
The acceleration of a particle starting from rest varies with time according to the relation A = – aω2sinωt. The displacement of this particle at a time t will be:
1.
2.
3.
4.
A particle is projected with velocity along x-axis. The deceleration of the particle is proportional to the square of the distance from the origin i.e., The distance at which the particle stops is :
1.
2.
3.
4.