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Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

(i) The diameter of neck and bottom of a bottle are 2cm and 10cm respectively. The bottle is completely filled with oil. If the cork in the neck is pressed

in with a force of 1.2kgf, what force is exerted on the bottom of the bottle?(ii) A ball is thrown vertically upwards. It returns 6s later. Calculate : (i) the greatest height reached by the ball, and (ii) the initial velocity of the ball. (Take g = 10metre per second square).

THIS IS THE ANSWER OF 2ND PART WHEN BALL IS THROWN UPWARDS THE FINAL VELOCITY IS ALWAYS 0 AND I AM TAKING g=10M/SEC2 SO USING 1 EQUATION OF MOTION HERE TOTAL TIME IS 6 WE KNOW TIME OF ASCENT=TIME OF DESCENT i.e TIME TAKEN TO REACH UPWARDS= TIME TAKEN TO COME DOWN SO TIME TAKEN TO REACH UP IS 6/32=3 SEC V=U+AT 0=U+(-10)*3 -U=-30 U=30 M/SEC SO, INITIAL VELOCITY IS 30 NOW TO FIND HEIGHT WE USE 2ND EQUATION OF MOTION S=UT + 1/2 (-g) T² S=30*3-1/2*10*9 S=90-45 S=45m

THIS IS THE ANSWER FOR 1ST PART (300N) WE KNOW IKGF=10N SO 1.2KGF= 1.2*10=12N NOW P=FORCE/AREA P=12/ (22/7*1*1) (WE ARE ASSUMING THE CORK AND BASE AS A CIRCLE) IN THE ABOVE EQUATION WE TOOK RADIUS AS 1 AND WHOLE AREA IS πR² SO THE PRESSURE IS 42/11 PASCAL AGAIN USING SAME FORMULAE P=F/A NO W P=42/11 AND AREA IS (22/7)*5*5 WE CAN FIIND THE FORCE WHICH COMES OUT BE 300N

THEIR CAN BE A SLIGHT MISTAKE IN THE ABOVE ANSWER BUT THE STEPS I HAVE DONE IS 100% CORRECT