Question

(1) An object of mass 100 kg is accelerated uniformly from a velocity of 5 ms-1
to 8 ms-1
in 6s.

Calculate the initial and final momentum of the object. Also, find the magnitude of the force
exerted on the object.


(2) Two objects each of mass 1.5 kg are moving in the same straight line but in opposite directions.
The velocity of each object is 2.5 ms-1 before the collision during which they stick together What will be the velocity of the combined object after collision?


(3) The frequency of a source’s sound is 100 Hz. How many times does it vibrate in a minute


Answer in Brief......​

Answer 1

Answer:

28.

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