A 0.5 kg object is whirled on the end of a string that is 1.2 m long at a speed of 7.5 m/s. Calculate the angular momentum of the object.
(Round your response to the nearest tenth, if necessary, and include the base unit abbreviation with your answer.)

4.5kg m^2 s−1

Explanation:

Step one:

the expression for angular momentum is given as

m=mass  = 0.5kg

v=velocity  = 7.5m/s

r=radius= 1.2m

Required

L=angular momentum

Step two:

substitute into the expression

L=0.5*7.5*1.2

L=4.5kg m^2 s−1

what is the question because that is not a question.

the answer is b, have negligible mass