posted by James .
Calculate the tension in a horizontal string that whirls a 1.9-kg toy in a circle of radius 2.3m when it moves at 2.8m/s on an icy surface.
Express your answer to two significant figures and include the appropriate units.
1.9(2.8)^2 .. then divid by 2.3
I got 12.30 N , is this correct ?
T=ma=mv²/R=1.9•2.8²/2.3= 6.48 N