Physics Paper one (P510/1)
S E C T I O N A
1. (a) (i) Define momentum of a body and state its standard units.
(ii) State the law of conservation of linear momentum.
(b) Two bodies A and B of masses 2.0kg and 3.0kg respectively, moving at right
angles to each other with respective velocities of 4.0ms-1
and 2.0ms-1
are
involved in a perfectly inelastic collision. Find
(i) Their velocity after collision.
(ii) The loss in kinetic energy of the bodies.
(c) A man who can swim at 5ms-1
in still water wishes to cross from one point of a
river bank to another directly opposite him. If the river is 400m wide and flows
at a speed of 4ms-1
, find
(i) The direction in which the man should swim
(ii) The time he will take to cross the river.
(d) Ship A is 10km south of ship B and is moving northwards at 100kmh-1
. Ship B
is moving eastwards at 120kmh-1
. Find;
(i) The shortest distance between the two ships.
(ii) The time it takes to reach the point of shortest distance.
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