K.C.S.E Physics Q & A - MODEL 2013PP1QN14
(a) State two ways in which the centripetal force on a body of mass m can be increased
(b) Figure 7 shows an object at the end of a light spring balance connected to a peg using a string. The object is moving in a circular path on a smooth horizontal table with a constant speed.
(i) State what provides the centripetal force.
(ii) Indicate with an arrow on the figure the direction of the centripetal force.
(iii) State a reason why the object is accelerating while its speed remains constant.
(iv) Given that the mass of the object is 0.5 kg and it is moving at a speed of 8 m/s at a radius of 2 m, determine the reading on the spring balance.
(c) A stone thrown vertically upwards reaches a height of 100 m. Determine the:
(i) initial velocity of the stone.
(Neglect air resistance and take g =10m/s2)
(ii) total time the stone is in air.
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FORM I - PHYSICS SYLLABUS
FORM II - PHYSICS SYLLABUS
FORM III - PHYSICS SYLLABUS
FORM IV - PHYSICS SYLLABUS
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