Given the vectors
Find the angle between
(A)
(B)
(C)
(D) none of these
The vector having a magnitude of 10 and perpendicular to the vector is-
1.
2.
3.
4.
A force acting on a particle causes a displacement . If the work done is 6J then the value of 'c' is-
1. 12
2. 0
3. 6
4. 1
A particle moving along a straight line according to the law , where x is its position measured from a fixed point on the line and t is the time elapsed till it reaches position x after starting from the fixed point. Here A, B and C are positive constants.
(1) Its velocity at t=0 is A
(2) Its acceleration at t=0 is B
(3) Its velocity at t=0 is B
(4) Its acceleration at t=0 is C
If the velocity of a particle moving on x-axis is given by . At which time is the acceleration of particle zero?
1. sec
2. sec
3. sec
4. zero
Momentum of a body moving in a straight line is . Find the force acting on a body at t=2 sec
(1) 6 N
(2) 8 N
(3) 4 N
(4) 2 N
A particle moves along straight line such that at time t its position from a fixed point O on the line is . The velocity of the particle when t=2 is:
(A)
(B)
(C)
(D)
Coordinates of a moving particle are given by and . The speed of the particle is given by
(1)
(2)
(3)
(4)
The x and y components of vector are 4m and 6m respectively. The x, y components of vector are 10m and 9m respectively. The length of is ______ and angle that makes with the x axis is given by _______.
(A)
(B)
(C)
(D)
A particle travels with speed 50 m/s from the point (3, 7) in a direction . Find its position vector after 3 seconds.
1.
2.
3.
4.