A toy rocket is launched with an initial velocity of 12.0 m/s in the horizontal direction from the roof of a 30.0-m-tall building. The rocket’s engine produces a horizontal acceleration of \left(1.60 m / s^{3}\right) t, in the same direction as the initial velocity, but in the vertical direction the acceleration is g , down-ward. Ignore air resistance. What horizontal distance does the rocket travel before reaching the ground?

Solution :

The motion in the y direction.

The time taken by the toy rocket to hit the ground,

S = distance travelled = 30 m

u = 0 m/s

a =

t= time in seconds

Therefore,

t = 2.47 sec

Now motion in the x direction,

u = 12 m/sec

Upon integration 'v' with respect to 't'

Once again integrating with respect to t,

  = 0.0176+29.64

   = 29.65 m

Therefore, the toy rocket will hit the ground at 29.65 m from the building.

explanation: magnetic pole, region at each end of a magnet where the external magnetic field is strongest. the south-seeking pole, or any pole similar to it, is called a south magnetic pole. unlike poles of different magnets attract each other; like poles repel each other.

the answer would be c. motion and direction

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