Physics - JEE mains PYQ

 Q. Position of an ant (S in metres) moving in Y-Z plane is given by S=2t²j+5k (where t is in second). The magnitude and direction of velocity of the ant at t = 1 s will be :

                                                        (Jee mains- 2024)

1. 16 m/s in y-direction 

2. 4 m/s in x- direction 

3. 9 m/s in z- direction 

4. 4 m/s in y-direction 

4 m/s in y-direction.

v=ds/dt=4t ĵ

At t = 1 sec v = 4ĵ

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