A rifle bullet with a mass of 13.5 g travelling toward the right at 291 m/s stri

Question

A rifle bullet with a mass of 13.5 g travelling toward the right at 291 m/s strikes a large bag of sand and penetrates it to a depth of 21.1 cm. Determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet. magnitude direction A 3.10 kg block starts from rest at the top of a 30.0 degree incline and slides a distance of 1.70 m down the incline in 1.00 s. Find the magnitude of the acceleration of the block. m/s2 Find the coefficient of kinetic friction between block and plane. find the friction force acting on the block. magnitude N direction Find the speed of the block after it has slid 3.70 m. m/s

Explanation / Answer

a)f=ma

=m*(u^2)/2s

=13.5*10^-3* 291^2 /(2*0.211)

=2709N

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