If the distance 's' travelled by a body in time 't' is given by then the acceleration equals
(1)
(2)
(3)
(4)
The velocity of a particle moving on the x-axis is given by where v is in m/s and x is in m. Find its acceleration in when passing through the point x=2m.
1. 0
2. 5
3. 11
4. 30
A particle moves in the XY plane and at time t is at the point whose coordinates are . Then at what instant of time, will its velocity and acceleration vectors be perpendicular to each other?
(1) 1/3 sec
(2) 2/3 sec
(3) 3/2 sec
(4) never
A motor boat of mass m moving along a lake with velocity . At t=0, the engine of the boat is shut down. Magnitude of resistance force offered to the boat is equal to rV. (V is instantaneous speed). What is the total distance covered till it stops completely?
(1)
(2)
(3)
(4)
A particle is moving along positive axis. Its position varies as where is in meters and is in seconds. The velocity of the particle when its acceleration zero is:
1.
2.
3.
4.
Two forces and are acting on a particle.
The resultant force acting on particle is:
(A)
(B)
(C)
(D)
and , then angle between vectors A and B is:
(1)
(2)
(3)
(4)
If vectors and are functions of time. Then, at what value of are they orthogonal to one another?
1.
2.
3.
4.
Six vectors through have the magnitudes and directions indicated in the figure. Which of the following statements is true?
1.
2.
3.
4.
and are two vectors and is the angle between them. If then the value of will be:
1. | 2. | ||
3. | 4. |