1.
The relation between time and distance is t=αx2+βx, where α and β are constants. The retardation is
1. 2αv3
2. 2βv3
3. 2αβv3
4. 2β2v3
2.
The coordinates of a moving particle at a time t, are given by, x=5 sin 10t, y=5 cos 10t. The speed of the particle is
1. 25
2. 50
3. 10
4. 50√2
3.
A satellite in force-free space sweeps stationary interplanetary dust at a rate dM/dt=αv where M is the mass, v is the velocity of the satellite and α is a constant. What is the deacceleration of the satellite ?
1. -2αv2/M
2. -αv2/M
3. +αv2/M
4. -αv2
4.
A body of mass 3 kg is moving under a force, which causes a displacement in it, given by S=t33(in m). Find the work done by the force in first 2 seconds .
1. 2 J
2. 3.8 J
3. 5.2 J
4. 24 J
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