## anonymous one year ago A steel ball and a plastic ball are thrown upward with the same initial velocity. Magneto unleashes a magnetic wave that gives the steel ball an additional horizontal velocity v while leaving the plastic ball unaffected. Which is most likely to happen? A. The steel ball will reach the ground first. B. The plastic ball will reach the ground first. C. Both balls will reach the ground at the same time. D. The time of flight depends on the balls’ masses. AND PLEASE EXPLAIN WHY THANK YOU

1. Abhisar

WoW !!! I just loved this question :D So, here the mighty magneto just imparted an additional horizontal velocity to the metal ball which will leave its vertical velocity unaffected. So both the plastic and metal ball will travel for the same time t upwards and then the same time t downwards (Find out why?) and thus will reach the ground at same time (2t). $$\sf \color{red}{Then~what~just~magneto~did?}$$ Magneto simply provided an extra horizontal velocity so that now the metal ball will have a parabolic trajectory instead of a straight line.

2. anonymous

yess :)

3. Abhisar

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4. anonymous

and this last question too please, can't seem to figure it out. should I convert thex and y components to a resultant force first and then solve it? or I could just straight away solve it using these available components?

5. anonymous

ohh, got it got it! :D

6. Abhisar

Sure?

7. Abhisar

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8. Abhisar

Marivec is located on the origin, let her ravel with a velocity $$xi+yj$$ m/s, then we can say that, 5/x=25 or x=0.2 metre/second [by using $$\sf Speed = \frac{Distance}{Time}$$] Again, in y axis, Jordan is moving with 1 m/s so by applying concept of relative velocity we can write that $$\sf \Large{\frac{10}{y-1}}$$$$\sf =25$$ [using $$\sf Speed=\frac{Distance}{Time}$$] $$\sf \Rightarrow 25y-25=10\\ \sf \Rightarrow25y=35~or~y=?$$